As you mentioned various symptoms that occur either as primary form or secondary form.
1. In primary/ idiopathic form the cause remain unknown.
2. Secondary form occurs due to various causes like skin conditions- mucus present in stool may irritate the local area causing pruritus
as well as some allergic reactions to any soap, detergents, sweat & moisture in local area may also aggravate the symptoms. Threadworm infestation may present as all of these symptoms. Some other infections like sexually transmitted disease
, bacterial and fungal infection
may also lead to pruritus ani problem.
So you should go for stool examination for presence of cyst/ ova, any type of bacterial organism, total blood count. Consult a physician for further management accordingly.
Thank you for consulting HCM.