Bullous Diabeticorum

Diabetic Bullae / Diabetic Blisters

Overview

Bullous diabeticorum is a distinctive, spontaneous blistering condition that occurs in patients with diabetes mellitus. Large, painless, tense blisters arise suddenly on the feet, legs, or hands without preceding trauma. The blisters are filled with clear, sterile fluid and heal spontaneously without scarring over 2-6 weeks. The exact mechanism is unknown but is thought to be related to diabetic microangiopathy.

Key Symptoms

• Sudden onset of large, tense, painless blisters
• Clear, sterile fluid within the blisters
• Most common on the feet, lower legs, and hands
• Arise on non-inflamed skin without preceding trauma
• Typically 0.5-5 cm or larger in diameter
• Heal spontaneously without scarring over 2-6 weeks

Affected Areas

Feet, Lower legs, Toes, Hands, Forearms

Care Instructions

1. Keep blisters intact and clean to prevent secondary infection.
2. Apply non-adherent wound dressings to protect the blisters.
3. See a dermatologist to confirm the diagnosis and rule out other blistering disorders.
4. Optimize blood sugar control, which may reduce recurrence.
5. Monitor for signs of secondary infection (increased redness, warmth, pus, or pain).
6. Blisters can be aspirated with a sterile needle if large and causing functional impairment; leave the roof intact.

Medical Disclaimer: This information is for educational purposes only and does not replace professional medical advice. Always consult a qualified dermatologist for diagnosis and treatment.

Prevalence: Uncommon; occurs in approximately 0.5% of patients with diabetes