mystery rash

My mother (77) has had a rash appear sporatically over different parts of her body, mostly hands and feet, during the spring/summer months. Small, bumpy, rash, that when scratched open, seems to eliminate the itch (kind of like chiggers). The rash seems to come and go throughout the day. Doctors are baffelled. They have taken her off high blood pressure meds and anything else she has taken. No changes in soaps,detergents, or anything environmentaly. Any suggestions of what to do next?


This discussion is related to Itchy, bumpy rash???.