I had an open inguinal hernia repair a week ago. when can i return to having sex?

You should wait for at least another week and then use pain during sex as the guidance and try to take a position with less stretching and straining. You will have some pain at first but you can continue if it does not interfere with your feeling. Stop if you have too much pain or discomfort and try a couple days later with a different position.

Wait till the area heals. 4-6 weeks. Sew involves exertion and straining of the repair area. so let it heal for a good recovery.