Diaper rash is a bright red breakout that is caused by irritation to a baby’s buttocks, thighs and genitals. It is usually caused by prolonged contact with urine or feces in the diaper area.

Diaper rash often appears after solid foods are added to a baby's diet or after a baby begins taking antibiotics. Consistently wet or infrequently changed diapers, diarrhea and the use of plastic pants to cover a diaper can also contribute to diaper rash. It is most common in babies during the first 12 months of life. However, some adults, including those who use adult diaper products for urinary or fecal incontinence (inability to control urination or defecation, respectively) may also develop diaper rash.

A visual examination is usually sufficient to identify diaper rash. In most cases, it can be treated with over-the-counter remedies, although prescription medications may be necessary to treat more severe cases.

The best way to treat diaper rash – and to keep it from occurring in the first place – is to ensure that skin remains as clean and dry as possible. It is especially important to change diapers promptly when they are dirty.