 [ Symptoms ] what information will i need to fill out a marketplace application [ Disease ] pinworms are always a possibility and you can certainly have a pinworm test to see if this is the underlying problem pinworms can be spread to adults by children especially those with less than optimum handwashing habits itching can be caused by improper hygiene allergic reactions to soaps improper rinsing during a shower allergic reaction to perfumed toilet tissue laundry detergents and dryer softener sheets skin tags tiny fissures or even small hemorrhoid can cause itching any skin condition especially a fungal skin condition can cause itching if your problem continues you will need to see a medical professional while having someone look at your bottom may seem embarrassing it is not considered a problem for clinicians they do it all of the time why suffer get some help if you cannot solve this issue yourself