Sexually transmitted infections (STIs) can be transmitted from any kind of sexual activity that involves the mouth, anus, vagina, or penis.
Anyone who is sexually active is at risk for an STI. Drug use and using other substances can increase the likelihood of catching an STI. Shared needles can spread STIs.
The symptoms of STIs are;
Bumps, sores, or warts on or near the penis, vagina, mouth, or anus.
Swelling, redness, or severe itching near the penis or vagina.
Discharge from the penis.
Vaginal discharge that has a bad odor, causes irritation, or is a different color or amount than usual.
Painful urination or frequent urination.
This is an initial answer. You may ask any follow up questions.