M.D. Most babies will get diaper rash at least once. Babies who are between 8 and 10 months old, or who are just starting to eat solid foods, are especially likely to get it.
Most diaper rash is caused by too much contact with moisture, urine or feces.
Lotions or soaps used directly on the baby's skin and detergents used to launder cloth diapers can also cause rashes. If home care doesn't get rid of your babies diaper rash in two or three days, your baby may have a fungal or bacterial infection. Babies on antibiotics are especially prone to fungal rashes. A good resource for more in-depth information about diaper rash is the American Academy of Pediatrics. Write to them at P.O. Box 927, Elk Grove, IL 60009-0927.