Q: What is Psoriasis?

A: Psoriasis is a chronic autoimmune disease that affects the skin, nails and joints. It causes scales to form on the skin (known as psoriatic plaques) and can cause pain in the joints. Psoriasis normally affects the joints of the body and is most common on the elbows and knees; it is also commonly found on the scalp and genitals and can affect the hands and feet. In addition to psoriatic plaques, psoriasis on the feet can include blisters, cracking and swelling.

Q: How do I treat Psoriasis on my feet?

A: Outbreaks should be treated promptly. Most treatments are topical and include: salicylic acid, corticosteroids and tar. Your doctor may prescribe you methotrexate, cyclosporine, acitretin or other oral medications if topical medications prove ineffective.
In addition to the treatment your doctor prescribes, some patients find it helpful to soak their feet in salt water during an outbreak. Soak your feet for approximately ten minutes, three times a day. Be sure to dry your feet thoroughly afterwards, especially the area between your toes.

Q: How do Psoriasis outbreaks on my feet affect my toenails?

A: Roughly 50 percent of people with psoriasis experience changes in the health of their nails. Common problems include: pitting, discoloration, thickening of the nail, deformation and the separation of the nail from the nail bed (oncholysis).

Q: How can I treat nail problems associated with psoriasis?

A: Some doctors will prescribe topical medications, although these treatments are not always successful because they are unable to reach the root of the nail, which is where the problem begins. More aggressive treatments include corticosteroid injections as well as the removal of infected nails.

In addition to treatments prescribed by your doctor, practice good nail care at home. Keep your toenails trimmed short and your feet (and shoes!) clean.

Q: What sort of shoes should I buy if I have psoriasis on my feet?

A: Look for shoes that will keep your feet cool and dry. Shoes should allow air to circulate freely; avoid shoes made of synthetic materials such as plastic. (The same goes for your stockings or socks. Avoid nylons or tights made of synthetic material that won’t let your feet breathe.) In addition, shoes should be lightweight and comfortable. Avoid shoes with pointy toes or other features that will pinch or put pressure on your feet. You may want to invest in insoles or orthotics that will cushion and protect your feet.