TLC & MoIsturizer
Lots of lotion, cream or ointment without color or scent.
Wash with water only, no (gentle) soap unless you see stubborn dirt, paint or poop. After bath time, pat dry and use olive oil to seal in the moisture. Use mild steroid cream like otc Hydrocortisone
1% cream or talk with your doc about something stronger. Figure out triggers like food, scented body products, detergent, fabric softener.