My husband has got bacterial infection and his one sides of the testicles has swollen a bit and his lower abdomen pains a lot. We had unprotected sex on my periods on the previous day. He consulted a doctor and doctor gave him medication and suggested blood test and ultrasound. But nothing was found in the report. There was little improvement. He also had hernia operation in the past. But again we had sex and after that his swollen testicles grew in three to four size. And pain also increased. We consulted another doctor. He is taking antibiotics injections and medication. His condition has started to improve. He also used to eat a lot outside food. I want to know what was the cause for his infection?