The diaper area doesn’t get a chance to dry out or have any exposure to fresh air, having to endure prolonged spells soaking in urine of faecal matter. The
diaper causes chaffing in the area and this constant friction causes the skin to become red, blotched, heated and grated, and these can lead to the area becoming infected, exacerbating the irritation and pain. Sometimes a superficial skin infection can trigger diaper rash. A prevalent infectious cause of diaper rash in adults is Candida albicans (a yeast fungus).
Irritant or Contact Dermatitis - Any irritant coming in contact with skin causes redness or erosion of the uppermost layers of skin. It is different from other causes of diaper rash because the areas of the skin not in contact with the irritant such as urine or stool do not get affected.