How do you know if someone has an STD?

Answer 1

You generally can't tell if a person has contracted an STD. If you notice a rash or, drainage, a funny smell, or small warts, those would be indicators; but these are not always present in an infected person. That is the problem with STD infections; many times there are no ways to tell. Most of the time there are no signs or symptoms.

Unless she has visible symptoms such as a discharge or lesions the only way to know whether or not he or she has an STD is tested. Even then, you can't say that someone is free of all STDs, because there is no commercially available test to demonstrate that someone doesn't have HPV, and no reliable test to rule out genital herpes in someone without symptoms.

Because test results are confidential it would be up to her to inform you of her condition. Since STDs are frequently asymptomatic (without symptoms) in women it is quite possible for a woman to be infected without knowing it until she is tested.

Although condoms do a better job of protecting against some STDs than others, it is ALWAYS best to insist he uses a condom.
Stds don't have visible symptoms, so you can't tell just by looking at some one if they have an std or not. Unless some one tells you if that they have an std then you're not going to know for sure.
Unfortunately, if they will not tell you, there is no way to accurately tell.

However, you have to ask yourself if you want to be involved with someone who you are concerned may have an STD. Also, if they cannot be honest with you, you may want to take a hard look at your relationship.
Most of the time you can't tell; that is the problem.
no
You can ask them about it VERY POLITELY as possible, or go to a doctor with them POLITELY as possible, attempt to not offend them.
Most of the time you can't tell if a person has a STD. Any funny smells, discharge, warts, or sores would be signs.