Welcome to platform of Health care magic,
Looks like the rashes are some fungal infection
(ringworm).can be easily treated with some antifungal and mild steroidal cream.
For the pain in abdomen one should go for the stool routine/microscopic-examination along with stool Ph and reducing substances to rule out bacterial infection,amoebiasisand lactose intolerance
. should be treated accordingly.
hope your query is answered.