Diaper rash or diaper dermatitis is the most common skin disorder in infants. It is an inflammation of the skin due to a variety of irritants present in the diaper area. The diaper area is moist and warm and this is conducive to bacterial and fungal infections.
Treatment starts with avoiding the various irritants.
That means frequent diaper changes and keeping the area as dry as possible. Using diapers that absorb the urine is also helpful. Applying various ointments or cream can provide some skin protection. If there is a secondary fungal infection then antifungal agents, such as nystatin, should be used. A fungal diaper rash is usually bright red with well demarcated somewhat raised borders.