Bullae of the feet

Bullae of the Feet: Causes, Symptoms, and Treatments

Bullae of the feet, also known as bullous foot, is a rare chronic inflammatory condition that usually manifests as painful, fluid-filled blisters on the feet. It usually affects adults more than children, and is caused by an inflammatory reaction to trauma, an infection, an allergic reaction, or a skin disorder. The condition can cause chronic pain and inflammation that can be difficult to treat, so early diagnosis and treatment are essential for recovery.

Bullae of the feet can affect the entire surface of the foot or just certain areas, such as the ankles or toes. The blisters can be filled with clear fluid, blood, or pus. Other signs and symptoms of the condition include redness, swelling, pain, and itching. In some cases, the affected foot may become hot during episodes of active bullous foot.

Causes of Bullae of the Feet

The exact cause of bullae of the feet is not known, but many factors are thought to be involved. These include trauma, an infection, an allergic reaction, or an underlying skin disorder such as eczema, psoriasis, or ichthyosis. In some cases, the blisters may appear as a result of an adverse reaction to certain medications, such as those used to treat arthritis.

Bullae of the feet may also occur as a result of physical trauma to the foot. This can include injuries sustained from athletic activities, such as running or jumping, as well as blisters caused by wearing new or poorly fitting shoes. Infection can also trigger the formation of blisters, as can contact with irritants, such as certain metal jewelry or certain detergents.


If you have any of the signs and symptoms of bullous foot, your doctor may recommend a physical examination and one or more tests to rule out any underlying skin disorders that may be causing the blisters. Tests may include a skin biopsy, a blood test, or imaging tests, such as an X-ray or MRI. If the diagnosis is uncertain, your doctor may recommend a skin culture to check for any bacterial or fungal infections.


Treatment for bullae of the feet is focused on relieving discomfort and preventing infections. The specific treatment may vary depending on the cause and severity of the condition. Treatment may include:

  • Anti-inflammatory medications to reduce inflammation and pain
  • Antibiotics to treat bacterial infection
  • Topical creams and ointments to provide relief from itching and pain
  • Corticosteroid injections to reduce inflammation and reduce symptoms
  • Surgery, if necessary, to remove the affected skin

In addition to the above-mentioned treatments, people with bullae of the feet should take care to keep the affected area clean and dry, and to avoid activities and clothing that may further irritate the area.