Regular check-ups The sooner you get tested, the sooner you can put your mind at rest. If results come back positive, then early detection means treatment can be more effective in making you healthy again. Some infections such as the HIV virus and Chalmydia, do not always show symptoms until they become more advanced, making them more difficult to treat. So if you are having sex then it is important to have regular check-ups. Click here for information about getting an early HIV test. For a list of sexually transmitted infections, with details about how soon they show symptoms, click here. Find out where your nearest free and confidential testing service is here.