The time taken for a vasectomy to heal can vary, but a person can start having sex once he feels comfortable to do so, as stated by the National Health Service. One must note that there is always sperm in the semen just after the operation.
It usually takes 20 to 30 ejaculations for the sperm to clear. Good personal care is essential to ensure that a vasectomy heals within a short time. It is necessary to wear close-fitting pants to support the scrotum. Painkillers can be used to ease the pain. Blood in semen is usually common, notes the NHS.