Hi, The commonest causes I can think about are: Diabetes in itself causes the skin to lose its integrity and thus easily gets succumbed to anything like urine and stool. Hence the first thing to do is to get the vitamin levels in blood checked and to get proper supplements under the advise of your Doctor, particularly for Vitamin A and D. The urine and stool have lots of bacteria which cause easy infection of the skin in contact, repeated every time it comes in contact and thus easily gotten rash. For this you have to use the skin protecting ointments. This will solve your problems. Whenever needed you can go for urinary catheter and proper bowel care and habit to avoid much of the problems. Also get the urine and stool tested and treated with antibiotics if there is any evidence of infection. Also use probiotics as these help for normal skin. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. T Chandrakant, ENT & General Surgeon