A round sore under the foot
Neuropathic ulcers often develop at a pressure point beneath the forefoot or heel and may be surrounded by callus.
Diabetic foot & wound circulation · Los Angeles
Non-healing wounds & diabetic foot ulcers need more than a dressing.
A foot sore can stay open because of pressure, nerve damage, infection, reduced blood flow—or several problems at once. EVSLA evaluates the circulation behind a slow-healing wound, then coordinates the vascular part of a limb-preservation plan when needed.
- Blood-flow testing first
- Diabetic-foot focused
- Coordinated wound care
A wound pattern worth checking
Has a foot sore stayed open?
- The wound is not getting smaller
- Redness, drainage, swelling, or odor appears
- The foot is cold, pale, dark, numb, or painful
Healing needs blood flow, pressure relief, and infection control.
Finding the limiting factor comes before choosing treatment.
Why is a diabetic foot ulcer not healing?
A diabetic foot ulcer may heal slowly when repeated pressure, loss of protective sensation, infection, or reduced arterial blood flow keeps interrupting repair. Diabetes can make more than one of these problems present at the same time.
A dressing protects the surface, but it cannot correct pressure or restore circulation. The wound, sensation, infection risk, foot mechanics, and blood flow should be evaluated together. A new diabetic foot sore deserves prompt medical attention; do not wait for it to become painful, because neuropathy may reduce feeling.
Sources: American Diabetes Association — Standards of Careand IWGDF 2023 Guidelines
Warning signs
Changes that deserve a closer look
Diabetic foot problems are not always painful. Compare both feet every day, document change, and contact a clinician promptly for a new sore, blister, color change, or swelling—especially if you have diabetes, neuropathy, kidney disease, or known PAD.
Pain is not the only alarm. Neuropathy can hide an injury, and PAD can limit healing. A painless wound can still be serious.
Visual signs
What a diabetic foot ulcer can look like
Appearance offers clues, not a diagnosis. Photograph the wound with consistent lighting and a size reference, protect it as instructed, and have a clinician assess depth, pressure, infection, sensation, and circulation.
Pressure may be involved
A wound on a toe or foot edge
Shoe friction, deformity, or low arterial flow may contribute. Location helps the care team look for the mechanical and vascular cause.
Dry, pale, sharply defined edges
An arterial or ischemic ulcer may look dry or “punched out,” but appearance alone cannot measure blood flow.
Thick callus hides the opening
Callus can conceal a deeper wound and keeps pressure concentrated at the same spot. Do not trim it yourself.
Redness or drainage spreads
Increasing warmth, swelling, pus, drainage, odor, fever, or chills can signal infection and needs prompt medical care.
Dark or black tissue appears
Black tissue can represent gangrene. It requires immediate assessment; do not cut, soak, or apply a home remedy.
A diabetic foot wound may be neuropathic, ischemic, infected, pressure-related, traumatic, or mixed. A lower-leg ulcer with swelling and skin staining may instead be venous—another reason the cause should be identified before treatment.
Why wounds stall
Four barriers can interrupt healing
Successful diabetic foot ulcer treatment is usually a system, not a single product. The team identifies which barriers are active and addresses them in the right order.
Pressure
The same spot is loaded again
Walking, footwear, deformity, or callus can repeatedly stress the wound. Offloading protects the site while it repairs.
Neuropathy
Protective feeling is reduced
Nerve damage can hide pain from a blister, puncture, burn, or pressure point, allowing the injury to worsen unnoticed.
Infection
Bacteria reach soft tissue or bone
Infection is diagnosed clinically and may require cultures, imaging, antibiotics, drainage, or debridement.
Ischemia
Too little blood reaches tissue
Arterial disease can limit oxygen delivery, antibiotic access, and healing. Objective testing determines whether blood flow is part of the problem.
Identify every barrier
Coordinate the right care
Guidelines emphasize pressure offloading, local wound care, infection management, vascular assessment with revascularization when needed, and metabolic care. Fixing only one barrier can leave the others in place.
(IWGDF/IDSA Guideline)When to seek care
Do not wait for a small sore to become a large problem.
If you have diabetes, report a new foot sore promptly rather than treating it alone. Infection, gangrene, and sudden loss of circulation require faster action.
Sources: CDC — Preventing Diabetes-Related Amputations and IWGDF/IDSA infection guideline .
Diagnosis
Evaluate the wound—and the blood reaching it
A vascular evaluation does not replace podiatry or wound care. It answers a specific question: is reduced arterial blood flow limiting the foot’s ability to heal, and is there a treatable path to improve perfusion?
- Examine the wound, both feet, pulses, temperature, color, sensation, and signs of infection
- Measure ABI plus toe pressure or toe-brachial index and arterial waveforms when appropriate
- Use duplex ultrasound, CTA, MRA, or angiography if anatomy must be mapped for treatment
Five questions guide the workup
1 · Wound
Where is it, how deep is it, and is it changing?
Size, depth, callus, tissue quality, drainage, and healing trend help define the problem.
2 · Pressure
Is mechanics keeping the wound open?
Sensation, footwear, deformity, callus, and walking pressure guide offloading.
3 · Infection
Is soft tissue or bone involved?
Clinical findings, labs, tissue sampling, X-ray, or MRI may be used when indicated.
4 · Blood flow
Can enough blood reach the wound?
ABI can be misleading in diabetes; toe pressures and waveforms often add important information.
5 · Anatomy
Can a target artery path be restored?
Imaging is added when revascularization is being considered.
The 2023 intersocietal PAD guideline recommends combining pedal Doppler waveforms with ankle and toe measurements in a person with diabetes and a foot ulcer. No single number excludes PAD in every patient. Read the guideline..
Diabetic foot ulcer treatment
Build a plan around the reason the wound is open
The right sequence depends on urgency. Infection or nonviable tissue may need immediate attention; severe ischemia may change what can safely be debrided; and pressure must stay off the wound throughout healing.
Protect
Relieve pressure and protect tissue
Offloading is a cornerstone for neuropathic plantar ulcers. The device or footwear must match the wound, balance, infection, ischemia, and patient tolerance.
- Clinician-selected offloading device
- Protective dressing and moisture balance
- Callus care by a trained professional
- Footwear and activity guidance
Control
Treat the wound and infection
Local wound care is combined with clinical infection assessment. Antibiotics are for infected wounds—not a substitute for offloading, perfusion, or source control.
- Cleansing and debridement when appropriate
- Culture or imaging when indicated
- Antibiotics and drainage for infection
- Glucose, nutrition, edema, and risk-factor care
Perfuse
Improve arterial flow when needed
If ischemia is limiting healing, revascularization may support tissue repair and infection control. No procedure can guarantee wound closure or limb salvage.
- Endovascular treatment
- Surgical bypass
- Hybrid treatment
- Ongoing perfusion and wound surveillance
When poor circulation is part of the problem
Creating a path for blood to reach the wound
If objective testing shows that arterial disease is limiting healing, EVSLA may consider an image-guided revascularization procedure. The target vessel, device, access site, anesthesia, setting, and recovery plan depend on the wound, anatomy, and whole patient.
- Blood-flow testing first
- Live image guidance
- Target-artery planning
- Device selected for the lesion
- Bypass considered honestly
- Coordinated wound follow-up
Balloon angioplasty
A small balloon is guided to a narrowed segment and inflated to enlarge the channel, with the goal of improving flow toward the wound.
Atherectomy
A specialized catheter may modify or remove selected plaque when the lesion and treatment plan make that useful.
Drug-coated balloon
A medication-coated balloon may be considered in selected arteries to reduce renarrowing after the vessel is opened.
Stenting
A mesh scaffold may be placed when the vessel needs support after treatment. Stents are not appropriate for every artery or lesion.
Vascular candidacy
When blood-flow evaluation belongs in the plan
EVSLA’s role is strongest when a foot or lower-leg wound has warning signs of arterial insufficiency, has stalled despite appropriate wound care, or is accompanied by PAD, rest pain, gangrene, or abnormal pulse testing.
The decision considers…
- Wound location, depth, duration, and healing trend
- Pulses, toe pressure, waveforms, and other perfusion findings
- Infection, diabetes, kidney function, neuropathy, mobility, and frailty
- Endovascular, bypass, hybrid, wound-care, and nonprocedural alternatives
- The patient’s goals and likelihood of a useful healing benefit
What happens
From referral to a coordinated healing plan
The sequence changes if there is severe infection, gangrene, or sudden loss of circulation. Stable wounds still need a complete plan and clear ownership of follow-up.
- Triage the urgency The team identifies signs that need emergency care, same-day infection management, or an expedited vascular visit.
- Review the wound story Duration, prior treatment, footwear, pressure, diabetes control, neuropathy, kidney disease, smoking, and previous vascular procedures.
- Examine the limb Both feet, pulses, temperature, color, sensation, wound characteristics, and signs of infection are assessed.
- Measure perfusion ABI, toe pressures, waveforms, duplex, or other tests are selected to answer the healing question.
- Map anatomy if needed CTA, MRA, or catheter angiography may be added when revascularization is under consideration.
- Coordinate follow-up Vascular care is integrated with podiatry, wound care, primary care, endocrinology, infectious disease, or surgery as the case requires.
Your care team
Who evaluates wound circulation at EVSLA
A diabetic foot ulcer often needs an interprofessional team. EVSLA evaluates the vascular component and coordinates with the clinicians managing pressure, local wound care, infection, diabetes, and mobility. Physician credentials and exact service pathways must be confirmed before publication.
Harout Dermendjian, MD
Endovascular Specialist
Featured in this concept for image-guided evaluation and treatment of lower-extremity arterial disease. Confirm approved diabetic-foot and limb-preservation language before publication.
Kartik Kansagra, MD
Endovascular Specialist
Featured in this concept for arterial assessment coordinated with podiatry, wound-care, primary-care, and referring clinicians. Confirm the actual care pathway before publication.
Sipan Mathevosian, MD
Endovascular Specialist
Featured in this concept for vascular and interventional radiology care. Confirm training, specialty description, and wound-circulation services against approved source content.
Where to request a wound-circulation evaluation
Three clinics across Los Angeles County
Call before traveling so the team can triage urgency and direct you to the appropriate setting. Confirm vascular testing, treatment capability, wound-care partnerships, scheduling, and hospital relationships for each location before publication.
Glendale
445 W Broadway
Glendale, CA 91204
Simi Valley
2750 Sycamore Dr, Ste 200
Simi Valley, CA 93065
La Cañada Flintridge
1407 Foothill Blvd
La Cañada, CA 91011
Questions patients ask
Diabetic foot wounds, answered plainly
Why will my diabetic foot ulcer not heal?
A diabetic foot ulcer can remain open when repeated pressure, neuropathy, infection, reduced arterial blood flow, or poor overall healing conditions keep interrupting repair. More than one barrier is common.
The next step is not simply a stronger dressing. A clinician should assess the wound, pressure pattern, sensation, infection risk, glucose and nutrition, and the blood reaching the foot.
What does a diabetic foot ulcer look like?
It may look like a round open sore beneath a pressure point, a blister that broke down, a wound at the edge of a toe, or a deeper opening surrounded by callus. An ischemic wound may appear dry, pale, or sharply defined.
Appearance alone cannot show depth, infection, bone involvement, or blood flow. Dark or black tissue, spreading redness, drainage, odor, fever, or rapid change needs immediate assessment.
How long is too long for a foot wound not to heal?
If you have diabetes, contact your clinician promptly for any new foot sore rather than waiting for a deadline. Neuropathy can hide injury, and early treatment can prevent progression.
A lower-limb ulcer that has remained open for more than two weeks plus objective ischemia can fit the chronic limb-threatening ischemia warning pattern. A wound that is enlarging, infected, discolored, or associated with rest pain needs faster evaluation.
When is a diabetic foot wound an emergency?
Seek immediate care for spreading redness, rapidly increasing swelling, pus, foul odor, fever, chills, wet gangrene, deep tissue exposure, or signs of severe infection.
Call 911 for sudden severe foot or leg pain with coldness, pallor or blue color, numbness, weakness, or loss of movement. Those symptoms can indicate acute limb ischemia.
Can poor circulation cause a wound not to heal?
Yes. Healing tissue needs oxygen, nutrients, immune cells, and medication delivered through the bloodstream. PAD can reduce that delivery and make an ulcer more difficult to heal.
Not every non-healing wound is arterial. Pressure, neuropathy, infection, venous disease, edema, trauma, and inflammatory conditions can contribute too, sometimes together.
How is circulation tested in a diabetic foot?
The evaluation begins with the history, foot and pulse exam, and pedal Doppler waveforms. Noninvasive testing may include ABI, toe pressure or toe-brachial index, pulse-volume recordings, and duplex ultrasound.
Diabetes and kidney disease can make ankle arteries difficult to compress, producing a misleading ABI. Toe measurements and waveforms can therefore be especially useful. CTA, MRA, or catheter angiography may be added if treatment is being planned.
Will antibiotics heal a diabetic foot ulcer?
Antibiotics treat a clinically infected wound; they do not correct pressure, remove all nonviable tissue, restore blood flow, or heal an uninfected ulcer by themselves. Guidelines advise against antibiotics for a clinically uninfected ulcer solely to promote healing.
If infection is present, the drug, route, duration, need for culture, drainage, or surgery depends on severity, tissue involvement, circulation, and the patient’s health.
Can restoring blood flow help a foot ulcer heal?
If objective testing shows that ischemia is limiting healing, revascularization may improve perfusion and support wound repair or infection control. Options may include an endovascular procedure, bypass, or a hybrid approach.
Revascularization does not replace offloading, wound care, infection treatment, glucose management, nutrition, or follow-up, and no procedure can guarantee wound closure or limb preservation.
Should I soak or cut a diabetic foot wound at home?
Do not cut callus or dead tissue yourself, and do not use soaking or home remedies in place of medical care. These can injure insensate skin, hide progression, or delay treatment.
Follow the wound-cleaning, dressing, offloading, and activity instructions given by your clinician. Contact the care team promptly if the wound changes or the dressing becomes wet, bloody, foul-smelling, or unexpectedly painful.
Is diabetic foot ulcer treatment covered by insurance?
Coverage for wound visits, podiatry, testing, imaging, offloading devices, antibiotics, and medically necessary revascularization depends on the plan, documented findings, network rules, and the proposed setting.
Before publication, replace this concept language with EVSLA’s approved benefit-verification and financial-responsibility policy.
Clinical review required before publication
Assign an EVSLA physician reviewer and confirm the wound-triage pathway, infection and emergency language, physician credentials, services, location capabilities, referral relationships, and insurance statements. Add reviewed and next-review dates. This page is general education and does not replace prompt medical assessment.
A wound that is not closing deserves a blood-flow answer.
A wound-circulation evaluation may include a foot and pulse exam, ABI and toe pressures, arterial waveforms, and anatomic imaging when appropriate. The goal is to identify whether ischemia is limiting healing and coordinate the next step with the wound-care team.
Request a Wound Evaluation
Call (818) 626-3710
For spreading infection, gangrene, or sudden circulation loss, seek immediate care.