A diaper rash is a skin problem that develops in the area beneath an infant's diaper.

Diaper rashes are common in babies between 4 and 15 months old. They may be noticed more when babies begin to eat solid foods.

Diaper rashes caused by infection with a yeast or fungus called Candida are very common in children. Candida is found everywhere in the environment. It grows best in warm, moist places, such as under a diaper. A yeast-related diaper rash is more likely to occur in babies who:

• Are not kept clean and dry
• Are taking antibiotics, or whose mothers are taking antibiotics while breast feeding
• Have more frequent stools

Other causes of diaper rashes include:

• Acids in the stool (seen more often when the child has diarrhea)
• Ammonia (produced when bacteria break down urine)
• Diapers that are too tight or rub the skin
• Reactions to soaps and other products used to clean cloth diapers
• Too much moisture