Recurrent anal itching have multiple causes like worm infestation, trauma to anal area, anal fissures, constipation etc. First we have to rule out if there is any injury to anal area. Eye itching may be due to allergic reaction or infection to eye.
Next Steps
Avoid oily, spicy food. Take good nutritional diet, drink pleny of water as constipation is the main cause of anal itching, warm seitz bath is adviced for anal itching.