Hi. Thanks for your query. The causes of such a intermittent pain and numbness in the right testicle can be due to the following reasons: Varicocele Epididymal block Epididymo-orchitis Internal cyst and so on. This can be diagnosed only on: Clinical evaluation and examination by a General Surgeon or Urologist and ultrasonography of the scrotum and abdomen with color doppler mode too. The treatment will be curative in some diseases if operated correctly. And there may be a need for a long course of an antibiotic and anti-inflammatory medicines if there is a medical reason for the pain. Get going for an early proper diagnosis and proper treatment.