(HealthDay News) -- A baby's sensitive bottom may develop a rash from sitting too long in a soiled diaper. But that's not the only trigger that can cause the problem.

The ADAM Encyclopedia offers these additional factors that may contribute to diaper rash:

• Frequent bowel movements or diarrhea.
• Use of an antibiotic.
• Irritation cause by ammonia, a byproduct of urine as it breaks down.
• Wearing diapers that don't fit properly and rub against the skin.
• Having a reaction to a cleaning product for cloth diapers.