4 Month Old Sick With N/v X 4 Days. N/v

4 month old sick with n/v x 4 days. N/v better, now diarrhea, 3/4 diapers in a day. Today red area on outer thigh size small orange, slight discolor end white area in middle of red area. Benadryl cream made it go away. Later mother area does same thing ????