Hi doc. i have these blistered spots appearing all over my body.. arms, fingers, legs mainly, ankle and toes. they're really itchy. what are these?

Blisters?: If you truly have blisters (containing fluid which drains out when opened) then you need to consult you doctor ASAP because this may be a sign of a serious illness. If they are just small raised bumps which subside < a day, then they are likely hives(viral infection is a frequent cause)., then try antihistamine up to 4 x/day. If problem gets worse or >6 wks. see allergist. ? drug reaction.