Hi i am 50 yrs. old i am 5'3 and weigh 220. In the past few yrs. i have been having trouble with my left arm on the fore arm. It is long, red, bumps underneath the skin. it sometimes burns, sometimes itches, it gets dark then red, It used to disappear but it has stayed for the last couple of months, The bumps underneath the skin are getting worse. When it does disappear it is dry scaly skin. Could this be psiorasis? thank you