Back Of Hands Swollen, Puffy W/puffy Red Spots Up Arms,

back of hands swollen, puffy w/puffy red spots up arms, especially in inside elbow area. Appears to be hives, except back of hands which entire area puffy . appears to be allergic reaction. only one change in daily life which I stopped and back of hands appeared to be less puffy. thought it would be gone within a few days. It isnt, its been 4 days since I stopped pill I thought could be causing it. Today one hand seems almost normal, but the other is more puffy. Could it be something other than allergic reaction? I'm 68 1/2 yrs old. Tks for your input. email is YYYY@YYYY