thanku for your query,
well i understand your concern,it can be allergic rash
, contact dermatitis
,that is caused when adverse reaction occurs when something touches the skin of palm like soap,detergent,fragnance,extreme cold
or extreme heat can also cause palm rash.
The treatment for this is avoidance of allergan,apply some skin soothening agent like caladryl
lotion ,twice or thrice per day. watch for any spread of this rash .
I hope your query is answered