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Diabetic Foot Ulcer vs Pressure Ulcer
Diabetic foot ulcers and pressure ulcers are both chronic wounds, and both involve pressure — but the pressure works in opposite ways. A diabetic foot ulcer forms on a foot that cannot feel repeated pressure while walking, because nerve damage has removed the warning of pain. A pressure ulcer (pressure injury or bedsore) forms when a person stays in one position too long and sustained pressure over a bony area cuts off blood flow. This page explains how cause, location, prevention, and risk differ between the two.
Educational reference · Updated 2026-05-16
Key takeaways
- A diabetic foot ulcer forms from nerve damage plus repeated pressure while walking — often worsened by poor circulation.
- A pressure ulcer forms from sustained, unrelieved pressure over a bony area in someone who cannot reposition themselves.
- Diabetic foot ulcers appear on the weight-bearing foot — under the ball of the foot, the toes, or the heel; pressure ulcers appear over the tailbone, hips, and heels.
- Prevention differs: offloading footwear and daily foot checks for diabetic ulcers, regular repositioning and pressure-relieving surfaces for pressure ulcers.
| Aspect | Diabetic Foot Ulcer | Pressure Ulcer |
|---|---|---|
| Main cause | Nerve damage (neuropathy) plus repeated pressure, often with PAD | Sustained unrelieved pressure over a bony prominence |
| Typical location | Sole of the foot — under the metatarsal heads, toes, or heel | Sacrum (tailbone), hips, heels, and other bony pressure points |
| Role of sensation loss | Central cause — the foot cannot feel the damaging pressure | Worsens risk, but pressure ulcers also occur with normal sensation |
| Who is most at risk | People with diabetes, neuropathy, and foot deformity | People who are immobile, bedbound, or use a wheelchair |
| Prevention | Offloading footwear, daily foot checks, glucose control | Repositioning schedules, pressure-relieving surfaces, skin care |
| Key risk | High risk of infection, bone infection, and amputation | Tissue breakdown that can deepen and become infected |
Two wounds, two kinds of pressure
Both ulcers involve pressure, but the mechanism differs. A diabetic foot ulcer is a wound of movement: each step puts pressure on the sole of the foot, and in a foot with neuropathy that pressure causes unfelt, repeated microtrauma that eventually breaks the skin down. A pressure ulcer is a wound of stillness: when a person cannot shift position, sustained pressure over a bony prominence compresses the tissue and its blood supply for hours, and the starved tissue dies. One comes from walking on a foot that cannot feel; the other comes from lying or sitting too long in one place.
Where each ulcer appears
Location is one of the clearest distinctions. Diabetic foot ulcers appear on the weight-bearing foot — most often on the sole under the metatarsal heads (the ball of the foot), on or between the toes, or on the heel, following the patterns of pressure during walking and any foot deformity. Pressure ulcers appear over bony prominences where body weight rests against a surface — the sacrum and tailbone, the hips and ischial tuberosities in someone seated, the heels, and sometimes the elbows or the back of the head. The body map of each wound reflects its cause.
The role of sensation
Loss of sensation plays a different role in each. In a diabetic foot ulcer, neuropathy is the central cause: pain is the body's alarm that tissue is being injured, and a foot that cannot feel pain has no warning to stop, shift weight, or notice a blister, a stone in the shoe, or an early sore. In a pressure ulcer, lost sensation raises the risk — a person who cannot feel discomfort will not shift position — but pressure ulcers also develop in people with completely normal sensation who simply cannot move, such as after surgery or during a long illness.
Prevention and the stakes
Because the causes differ, so does prevention. Diabetic foot ulcers are prevented by offloading the foot — therapeutic footwear, custom orthotics, sometimes total-contact casting — plus daily foot inspection and good glucose control. Pressure ulcers are prevented by relieving pressure — regular repositioning, pressure-redistributing mattresses and cushions, and keeping skin clean and dry. Both are staged by clinicians to guide treatment. The stakes are high for both: diabetic foot ulcers are the leading cause of lower-limb amputation and carry a serious risk of bone infection, while deep pressure ulcers can extend to muscle and bone and become dangerously infected.
When to See a Wound Care Specialist
See a wound care specialist for any open sore on the foot if you have diabetes — even a small, painless one — and for any non-healing wound over the tailbone, hip, or heel in someone with limited mobility. Early evaluation is critical: diabetic foot ulcers can progress quickly to bone infection and amputation, and pressure ulcers deepen fast once they form. People with diabetes and neuropathy should have routine foot checks before an ulcer ever appears. Seek prompt care for spreading redness, warmth, swelling, foul odor, drainage, or fever, and for any wound that exposes deeper tissue.
People Also Ask
Common Questions
What is the difference between a diabetic foot ulcer and a pressure ulcer?
A diabetic foot ulcer forms on a weight-bearing foot when nerve damage removes the sensation of pain, so repeated pressure from walking injures the skin unnoticed. A pressure ulcer forms when a person stays in one position too long and sustained pressure over a bony area — like the tailbone or heel — cuts off blood flow and the tissue dies. One is driven by movement on an insensate foot; the other by prolonged stillness.
Why does my diabetic foot ulcer not hurt?
A painless foot ulcer is a classic sign of diabetic neuropathy — nerve damage from diabetes that removes the protective sensation of pain. The lack of pain is dangerous, not reassuring: it means the foot cannot warn you that tissue is being injured, so ulcers form and worsen unnoticed. This is exactly why people with diabetes are advised to inspect their feet every day and to have any sore evaluated promptly, regardless of whether it hurts.
Can a pressure ulcer happen even with normal feeling?
Yes. While loss of sensation increases the risk, pressure ulcers develop in people with completely normal feeling whenever they cannot reposition themselves — for example after major surgery, during a long hospital stay, or with severe illness. The core cause is unrelieved pressure over a bony area, not sensation loss. That is why repositioning, pressure-relieving surfaces, and skin care are recommended for anyone with limited mobility.
How are these ulcers prevented?
Diabetic foot ulcers are prevented by offloading pressure from the foot with therapeutic footwear and orthotics, inspecting the feet daily, and controlling blood glucose. Pressure ulcers are prevented by relieving pressure — repositioning on a regular schedule, using pressure-redistributing mattresses and cushions, and keeping skin clean and dry. In both cases, catching an early sore before it deepens is far easier than healing an established ulcer.
Which is more likely to lead to amputation?
Diabetic foot ulcers carry the higher amputation risk. A non-healing diabetic foot ulcer is the most common event leading to lower-limb amputation, especially when infection reaches bone or when poor circulation prevents healing. Pressure ulcers can also become severely infected and damage deep tissue, but they less often lead directly to amputation. Both deserve early, specialist care to protect the limb and prevent serious complications.
Related Services
References
- Diabetic Foot — Patient Reference — NIH MedlinePlus
- Pressure Sores — Patient Reference — NIH MedlinePlus
- Diabetes and Your Feet — Patient Information — Centers for Disease Control and Prevention (CDC)
- Preventing Pressure Ulcers in Hospitals: A Toolkit — Agency for Healthcare Research and Quality (AHRQ)
General information, not medical advice. This page is educational. It does not create a physician-patient relationship and is not a substitute for evaluation, diagnosis, or treatment by a qualified clinician familiar with your individual history. If you have a wound that is worsening, severely painful, rapidly spreading, or accompanied by fever, seek in-person care or call 911. Please do not send protected health information (photos, medical records, diagnoses) through unencrypted email or web forms; call the clinic directly to discuss your situation.
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