Could eating gluten cause me to have a itchy anus after being to the toilet?

Pruritis Ani. Gluten sensitivity is not a common cause of itching. If the ingestion of glutnen leads to significant loose stool, it can compound itching. Pa is caused primarily from ph changes created by certain foods and trauma from excessive wiping. One simple way to test is to eliminate or minimize gluten but i typically recommend stool bulking with fiber to decrease ph and local care to limit trauma.