Not Medical Advice: STḌ's or STI symptoms aren't always obvious. They are often asymptomatic.
Secondary-stage syphilis can cause headaches or problems with hearing, balance, or vision because the brain, inner ears, or eyes are infected.
STḌ's that can cause sore throat includes: chlamydia, gonorrhea and HIV.
STIs are the most common contagious (easily spread) infections in the United States, with millions of new cases each year. Although some STIs can be treated and cured, others cannot.
Here's how to prevent séxually transmitted infections shared by Acog.org.