What can cause bad diaper rash! please help!?

Diaper rashes, types: Children are prone to rashes in the diaper region as a result of illness, recent antibiotic use, frequent diarrhea or chronic moisture under the diaper or underwear. There are different types of rashes, such as irritant rash, fungal infection or bacterial infection. Creams like Desitin (zinc oxide diaper cream) or A&D ointment should help. See your doctor if symptoms persist or worsen.