For people living with diabetes, even a small blister, cut, callus, or irritated area on the foot deserves attention. Diabetes can affect sensation, circulation, immune function, and wound healing, which means a seemingly minor foot problem may sometimes develop into a diabetic foot ulcer.
A diabetic foot ulcer is an open sore or wound that requires appropriate medical evaluation. Because neuropathy can reduce the ability to feel pain, some patients do not realize an ulcer has developed until they notice drainage, swelling, discoloration, or a change in the skin.
Bay Podiatry Associates in Brooklyn, NY provides diabetic foot care and evaluates wounds, ulcers, and other foot problems that may place patients with diabetes at risk for complications.
What Is a Diabetic Foot Ulcer?
A diabetic foot ulcer is an open wound or area of skin breakdown occurring on the foot of a person with diabetes.
Ulcers commonly develop on areas subjected to repeated pressure, such as the bottom of the foot, heel, toes, or areas affected by a foot deformity.
The severity can vary considerably. Some ulcers involve only superficial tissue, while others extend into deeper structures.
Why Does Diabetes Increase the Risk of Foot Ulcers?
Several diabetes-related complications can contribute to ulcer formation.
One of the most important is peripheral neuropathy. Over time, diabetes can damage nerves and reduce protective sensation in the feet.
When sensation is impaired, a person may not feel a blister, cut, pressure point, or foreign object inside a shoe. The person may continue walking on the injured area, allowing the damage to worsen.
Diabetes may also be associated with circulation problems and impaired wound healing, increasing the risk of complications once a wound develops.
What Are the Early Warning Signs of a Diabetic Foot Ulcer?
An ulcer does not always begin as an obviously deep wound.
Early warning signs can include:
- A blister that does not heal
- Redness or skin irritation
- An open sore
- Drainage on a sock
- Swelling
- A callus with discoloration underneath it
- Cracked or broken skin
- Changes in skin color
- An unusual odor
- Warmth around an affected area
Because neuropathy can reduce pain, the absence of discomfort should not be used to determine whether a wound is serious.
Can a Callus Turn Into a Diabetic Foot Ulcer?
A callus develops in response to repeated pressure or friction.
In a person with neuropathy, excessive pressure beneath a thick callus can damage the underlying tissue without causing noticeable pain. In some cases, bleeding or ulceration can develop beneath the callus.
Patients at increased risk should not attempt to aggressively cut or shave calluses themselves.
Why Are Diabetic Foot Ulcers Dangerous?
An open wound provides a potential pathway for bacteria.
If infection develops, it can spread into surrounding soft tissue and, in severe cases, deeper structures such as bone.
Complicated diabetic foot infections can require extensive treatment and may threaten the affected limb.
Early identification and appropriate management are therefore important.
How Are Diabetic Foot Ulcers Evaluated?
A podiatric evaluation may include examination of the wound’s location, size, depth, surrounding skin, drainage, and signs of infection.
The podiatrist may also assess:
- Foot circulation
- Protective sensation
- Pressure points
- Foot deformities
- Calluses
- Footwear
- Previous ulcer history
Imaging or additional diagnostic testing may be necessary when deeper infection or bone involvement is suspected.
What Is Offloading?
Offloading means reducing pressure on an injured or ulcerated area.
This can be an essential component of diabetic foot ulcer management because repeated pressure during walking can interfere with healing.
The appropriate method depends on the wound’s location, severity, and the individual patient’s circumstances.
How Are Diabetic Foot Ulcers Treated?
Treatment depends on the individual wound.
Management may include appropriate wound care, removal of unhealthy tissue when medically indicated, pressure reduction, infection treatment, dressings, and management of contributing conditions.
More complex wounds may require coordinated care with other medical specialists.
Can Diabetic Foot Ulcers Be Prevented?
Not every ulcer is preventable, but careful foot care can substantially reduce avoidable risks.
Patients may be advised to:
- Inspect their feet every day
- Look between the toes
- Check shoes before wearing them
- Wear appropriately fitting footwear
- Avoid walking barefoot if sensation is reduced
- Manage blood glucose according to their healthcare plan
- Report wounds promptly
- Attend recommended podiatric examinations
Patients with previous ulcers may require particularly close monitoring because a history of ulceration increases the risk of future problems.
When Should You Contact a Podiatrist?
A person with diabetes should seek professional guidance for an open wound, unexplained drainage, skin breakdown, blister, or concerning change in the foot—particularly when neuropathy or circulation problems are present.
Rapidly spreading redness, substantial swelling, discoloration, fever, chills, foul drainage, or other signs of serious infection require urgent medical attention.
Frequently Asked Questions About Diabetic Foot Ulcers
What does a diabetic foot ulcer look like?
It may appear as an open sore, blister that has broken down, crater-like wound, or area beneath a callus. Appearance varies according to severity.
Do diabetic foot ulcers always hurt?
No. Neuropathy can reduce sensation, so significant ulcers may cause little or no pain.
Where do diabetic foot ulcers usually develop?
They commonly occur in areas exposed to pressure, including the bottom of the foot, heel, toes, and areas affected by structural deformities.
Can a small diabetic foot ulcer become serious?
Yes. Even a small wound can worsen or become infected, particularly when healing or sensation is impaired.
Should I treat a diabetic foot ulcer myself?
Diabetic foot ulcers should be professionally evaluated. Home treatment alone may delay diagnosis of infection, pressure problems, or deeper tissue involvement.
Why won’t my diabetic foot wound heal?
Persistent pressure, neuropathy, infection, impaired circulation, blood glucose management, and other health factors can influence wound healing.
Can diabetic foot ulcers come back after healing?
Yes. Recurrence is possible, particularly if underlying pressure points, deformities, neuropathy, footwear issues, or other risk factors remain.
How often should someone with diabetes check their feet?
Daily self-inspection is commonly recommended, particularly for people with neuropathy or other risk factors. Your healthcare team can provide individualized guidance.
What should I do if I find a blister on my diabetic foot?
Do not ignore it. Protect the area from additional trauma and contact an appropriate healthcare professional for guidance, particularly if you have neuropathy, poor circulation, or a previous ulcer.
When is a diabetic foot ulcer an emergency?
Signs of rapidly progressing infection, spreading redness, fever, chills, substantial swelling, discoloration, severe drainage, or systemic illness require prompt medical attention.
Contact Information
If you have diabetes and notice an open sore, blister, skin breakdown, or other concerning change in your foot, contact Bay Podiatry Associates for an evaluation.
Bay Podiatry Associates
8635 21 St Ave Suite 1C
Brooklyn, NY 11214
Phone: (718) 266-1986
Website: baypodiatrybrooklyn.com
Book Online: baypodiatrybrooklyn.com/appointments/