How long does it take to see the signs of an std?

Depends on the STD: You could have an STD and be asymptomatic — without any signs or symptoms. In fact, this happens with a lot of STDs. Even though you have no symptoms, you're still at risk of passing the infection along to your sex partners. That's why it's important to use protection, such as a condom, during sex. And visit your doctor on a regular basis for STD screening.