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Which STDs cause which symptoms, the questions people actually search.
An itchy or painful anus can be caused by several STIs - most commonly genital herpes (painful sores), pubic lice or 'crabs' (intense itching), and rectal gonorrhea or chlamydia (often silent, sometimes itching or discomfort).
Red, goopy, or irritated eyes can come from a sexually transmitted infection - most often gonorrhea or chlamydia reaching the eye, and occasionally herpes.
Nongonococcal urethritis (NGU) in men usually shows up as a thin, clear or cloudy (mucoid) discharge, burning or pain during urination, and an itchy or tingling feeling inside the tip of the penis.
Anal warts and hemorrhoids both show up as bumps near the anus, but they're entirely different problems.
Pelvic or lower-abdominal pain in women most often traces to one of three things: pelvic inflammatory disease (PID), a sexually transmitted infection of the upper reproductive organs; a urinary tract infection (UTI); or an ovarian cyst.
The STIs most likely to cause flu-like symptoms - fever, fatigue, body aches, swollen glands - are HIV, syphilis, hepatitis B, and hepatitis C. Each tends to show up weeks after exposure, not days.
Mouth or throat symptoms after oral sex can come from a handful of sexually transmitted infections - most often gonorrhea, syphilis, and herpes, with chlamydia possible but usually silent.
Genital warts are HPV-caused growths that feel rough or cauliflower-like and cluster anywhere in the genital area; skin tags are soft, smooth, flesh-colored flaps that aren't contagious; pearly penile.
Vaginal itching, burning, and discharge get blamed on yeast more than anything else - but yeast is just one of several causes, and the others can look almost identical.
Trichomoniasis symptoms, when they show up, include vaginal itching, burning, soreness, painful urination, and a clear, white, yellowish or greenish discharge with a fishy odor in women; men may notic.
Penile symptoms - discharge, burning when you pee, sores, or itching - most often point to chlamydia, gonorrhea, nongonococcal urethritis (NGU), genital herpes, or syphilis.
If a groin rash itches more than it hurts and spreads outward in a ring with a clearer center, it's most likely jock itch (a fungal infection).
A genital bump blamed on an ingrown hair is often exactly that - a single bump with a trapped hair that clears on its own. But the same spot can also be genital herpes, an HPV genital wart, or mollusc
Razor burn shows up within a day of shaving as a patch of diffuse redness and tiny irritation bumps that fade in a day or two.
A sore throat after oral sex can come from a sexually transmitted infection.
Bleeding after sex (postcoital bleeding) can be caused by several STIs - most often chlamydia, gonorrhea, and trichomoniasis, which inflame the cervix and leave it fragile enough to bleed on contact.
Genital warts, herpes, and molluscum bumps look enough alike that you usually can't tell them apart by sight.
Several STIs can cause vulvar itching, sores, or swelling, most often genital herpes (painful blisters and sores), trichomoniasis (itching with frothy discharge), and pubic lice (itching plus visible nits).
LGV symptoms most often show up as rectal trouble - mucoid or bloody discharge, anal pain, constipation, and a constant urge to pass stool (tenesmus) - or as tender, usually one-sided swelling of the
Penile symptoms - discharge, burning when you pee, sores, itching, or rash - are most often caused by chlamydia, gonorrhea, nongonococcal urethritis (NGU), genital herpes, or syphilis.