Hello Thanks for query . Your husband has undergone vasectomy 7 ears back and since then facing problem of severe pain in genitals and have been diagnosed to have Epididymitis . This is known as Post Vasectomy Pain Syndrome and develops immediately or after few years after vasectomy . The epidermises of vasectomized men are often swollen and distended from back pressure effects.This leads to either Congestive Epididymitis or formation of sperm granuloma which is cause for pain . Looking at the severity and chronic nature of pain and discomfort medicines do not offer much help to resolve the issue , The only best option is to undergo surgery of Vasectomy Reversal .This helps to give relieve from pain for forever. Dr.Patil.