According to the Mayo Clinic, if your child has a sever diaper rash, they should be seen by a doctor. A serious rash could be a sign of a more serious condition, such as an allergy to certain foods or products that the baby regularly interacts with. It could also be a sign of a bacterial or fungal infection. Antibiotic use can also cause a bad rash on baby's skin.
The Mayo Clinic recommends over-the-counter creams, such as A+D or Desitin, to treat diaper rash. Creams are a much better choice than ointments because they dry on the skin and allow air into the region. Letting the skin dry is important to prevent infection or further irritation. WebMD suggests taking other precautions during diaper changes to ensure healing of the rash. Wash the area with warm water, but avoid soap if possible. Do not use baby wipes that contain alcohol or propylene glycol, as these can further irritate the rash. They may also allow the bacteria to spread to other areas of the skin. To prevent diaper rash in the future, both the Mayo Clinic and WebMD suggest changing diapers more frequently, especially at night if the child is subject to heavy wetting or soiling.