It can be due to pompholyx but what is surprising is that it is affecting all family members and the condition is looking like scabies skin
. The first stage is acute and presents as itchy
blisters on the hands, fingers and toes. Then the chronic stage shows more peeling, cracking, or crusting. Then the skin heals up, or the blistering may start again. The exact cause is not known and excessive sweating can be one of the reasons.