Porokeratosis is a general term to a group of dermatological problems that occur in various parts of the body. This discussion is limited to punctate porokeratosis. These lesions are described as dozens of discrete or grouped seedlike hyperkeratotic lesions with characteristic thin, raised ridgelike margins that develop on the palms and the soles. Patients
usually have other forms of porokeratosis as well, most commonly the linear or Mibelli types. Because of their description many patients will refer to them as seed corns. This information is from foot-pain-explained.com.
Porokeratosis is a premalignant condition, with certain groups of patients at greatest risk for malignant transformation.
Other sources on the internet will tell you there is no real cure but a series of treatments is avaialble which can be effective for some people. What treatments you try probably depends on how much the condition bothers you. I only have a couple of spots that a visible to others at arms length, so i have never felt the need to pursue treatments which are not established as being effective for a significant percentage of sufferers.
Cure for Porokeratosis (plugged sweat glands in the feet)I had several of these treated by a podiatrist over a year ago, who cut them out with a scalpel & made padded insoles for my work shoes. He told me to put cooking oil on my feet 1-2x per day to prevent them from coming back, at least before bed. After many ruined sheets (the oil soaks right through even thick socks), I stopped doing this except when my feet felt especially dry or when I happened to think of it. I threw away my shoes without remembering to take out the insoles & the plugged sweat glands came back a few months ago.I tried finding a cure on the Internet & was going to head back to pay another $300 at the doctor, but then I read at this site: http://www.zfootdoc.com/seed.htm>>>Why they even develop is still a mystery. The best guess is they are a special type of callus. In fact they seem to develop in calluses. They are called plugged sweat ducts because of the mistaken notion that an underlying sweat duct must be plugged.