Diabetic Foot Ulcers – Causes, Symptoms & Prevention
What are Foot Ulcers?
Foot ulcers are open sores or lesions that develop on the foot and typically take a long time to heal. They most commonly occur on the bottom of the foot, especially the heel and ball of the foot.
Foot ulcers can be caused by a number of conditions, but the most common cause is diabetes. Other conditions that can cause foot ulcers include poor circulation, peripheral artery disease (PAD), rheumatoid arthritis, and infections.
Foot ulcers are a serious complication that can lead to infection, tissue breakdown, and hospitalization. If you have diabetes or any condition that increases your risk, daily foot inspection is vital.
How do Foot Ulcers Develop?
Peripheral Neuropathy
Nerve damage causes loss of sensation in the feet. Patients may not feel cuts, blisters, or calluses, which can quickly become infected and deteriorate into ulcers.
Poor Circulation
Restricted blood flow to the lower extremities delays cellular healing, decreases oxygen supply, and significantly elevates the risk of severe infection.
Ill-Fitting Shoes
Footwear that is too tight or excessively loose causes continuous friction and pressure points, leading to blister formation and chronic skin breakdown.
Dry Skin & Cracking
Dry, inelastic skin cracks easily, allowing opportunistic bacteria to enter the dermal layers and trigger open sores.
Tips for Preventing Foot Ulcers
- Daily Foot Hygiene: Wash your feet daily in lukewarm water with mild cleanser and dry thoroughly, especially between the toes.
- Daily Inspection: Check your soles, heels, and toe webbing every day for cuts, redness, swelling, or warm spots using a hand mirror if necessary.
- Moisturization: Apply a skin-protective barrier gel or moisturizing lotion to maintain elasticity, avoiding excess moisture directly between toes.
- Supportive Footwear: Always wear seamless, well-cushioned shoes with proper arch and heel support. Never walk barefoot, even indoors.
- Neuropathy Precautions: If feeling is reduced, test water temperature with your wrist or elbow before bathing to prevent burns.
What are Diabetic Foot Ulcers?
Diabetic foot ulcers are open sores that develop in people with diabetes as a consequence of impaired blood flow and diabetic peripheral neuropathy. Small cuts or pressure spots frequently go undetected until deep tissue breakdown occurs.
Major Risk Factors Include:
- Blood Sugar Fluctuations: Chronic hyperglycemia damages microscopic nerve fibers and peripheral vessels.
- Loss of Protective Sensation: Inability to feel friction, heat, sharp objects, or blisters.
- Arterial Insufficiency: Reduced arterial supply hampers tissue regeneration and immune response.
- Foot Structural Deformities: Bunions, hammertoes, or claw toes that concentrate excessive plantar pressure.