Sedating dog with benedryl
Fungal infection with Candida albicans (picture) tends to appear in moist skin areas, like in the groin.
Long term antibiotics, steroids, chemotherapy, and disorders with low immunity promote candida growth.
Diarrhea or bowel incontinence with frequent flow of bowel contents over anal mucosa, and frequent wiping may cause anal itch.
The cause has to be removed (food poisoning, intestinal parasites, etc).
Moistened tissues may be used when anus is sensitive.
They may itch or burn, especially after prolonged sitting, or straining.
Hemorrhoids may develop in obesity, repeated prolonged sitting, constipation, repeated straining at bowel movements, and in pregnancy.
Lack of dietary fibers and fluid, lack of activity (physical and/or psychical), and several medications also contribute to constipation. Mild to moderate hemorrhoids resolve by their own in few days.
In some cases irritation is caused by food allergy.
Seborrheic dermatitis is skin inflammation due to excessive excretion of oil by sebaceus (oil) glands and subsequent infection with Malassezia yeasts.