Get Tested for STIs

STD testing

Also called Sexually transmitted infections, STD test, STI test, Getting tested

4 min plan76 min with every studyUpdated Sep 28, 2026

Who it's forA man aged 18 to 45 who thinks he may have caught something.

When to see a doctor

Call 911 or go to the ER now: sudden, severe pain in a testicle, or testicle pain with feeling nauseous or throwing up or belly pain, or lasting more than an hour. It can be a twisted testicle. Do not drive yourself.
Call 911 now: swelling of the lips, mouth, throat or tongue, or struggling to breathe, after an antibiotic or injection.
A sexual health clinic or the ER: a possible HIV exposure in the last 72 hours, such as a split condom or sex with a partner who may have HIV. PEP only works inside 72 hours.
Symptoms of gonorrhea plus any of these: red, itchy or painful eyes, pus on the eyelashes, a fever, joint pain or swelling, or a pimply rash. Get same-day care.
Same-day care: swollen testicles, a lump, a change in shape, or an ache you are worried about.
A UK sexual assault referral center, open to everyone, gives care, PEP and STI treatment; in the US, an emergency department.
A sexual health clinic: any discharge, burning, sores, blisters, lumps or rash, or a partner who has tested positive.

I am not a doctor. This is not medical advice. This is self-education. Every dose on this page is the one a trial, a guideline or a label used, quoted from it. It is not a prescription. Talk to a sexual health clinic or a physician who has your history before any medicine. Sudden testicle pain, or a possible HIV exposure in the last 72 hours: get help now.