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What causes vaginal discharge to change color and smell bad?

For the past few months, I’ve had vaginal discharge that has an off-color and a pretty bad odor. What is it?

After anal sex, I noticed that my anus looks black. Why would that be?

I’m a 28-year-old married woman, and my husband and I are heavy into anal sex. I noticed that my anus has become black all around. Do you know why? And is it safe for my husband to cum inside my anus?

I intimately kissed a girl...a few days later I noticed a white sore under my tongue and then a red sore on my lip. Are these STD symptoms?

I intimately kissed a girl, and few days later I got a small white sore under my tongue and then on my lower inside lip. And now I have a small light red sore on my outside lip and it itches. Are these symptoms of an STD?

I had sex for the first time...now I always feel like I have to pee and my penis sort of tingles. Is this an STD?

I had sex with a girl and later that day, I felt like I always had to pee...but very little urine came out, and my penis sort of tingles. Is this a symptom of an STD? If so, I thought that it took a while for symptoms to occur, not the same day. She’s my first sexual partner.

My boyfriend has red lines around his penis...is an STD the cause?

My boyfriend has red lines around his penis, just below the head. Sometimes they are dry and chapped, and sometimes they look very red and shiny. He says sometimes they’re sore, and intercourse is irritating. I think it’s from having sex with different partners. I may be wrong, but when I ask him to get his symptoms checked out, he refuses.

I’m a virgin but I have tiny raised white dots on my foreskin...what could these be?

I’m a 16-year-old male, and I haven’t had any sexual contact with anyone yet. But I’ve noticed tiny white, slightly raised dots covering a large part of my foreskin. I looked at pictures online, and I don’t think they’re genital warts. I don’t even know how long I’ve had these symptoms...maybe my whole life. Can you help me understand what these are? They’re affecting my confidence, and I’m worried about starting sexual relations.

Is cunnilingus the cause of my wife’s PID diagnosis?

Can my wife acquire pelvic inflammation through saliva during cunnilingus? On two occasions, she had symptoms of pain and burning feeling in her fallopian tubes and the doctor diagnosed PID for which she took antibiotics. Is cunnilingus the cause?

Could this rash on my penis be a yeast infection? Can men get yeast infections?

I have cracked skin on the tip of my foreskin. It’s not painful, itchy or sore and it feels just like the other skin around it. The only difference is that its "blemished" color makes it stand out. I have had unprotected sex once (due to a condom break), but I have had this blemish ever since I can remember - even before I became sexually active. Occasionally, when I masturbate too much it will get red and irritated, and the dead skin may scab. I got checked for STDs at a clinic twice, and it wasn't diagnosed as anything...and from what I gather online, what I have is similar to a yeast rash. I thought it was more common for girls to get yeast infections. What’s your advice?

I have a couple bumps on my penis, but they don’t look like pictures I’ve seen of genital warts. What else could they be?

About a month ago, I noticed a tiny bump on the head of my penis. A week ago, another tiny bump appeared beside the first one. I've seen pictures of genital warts, but my bumps look nothing like the pictures I’ve seen. Do I have an STD? I’m concerned. 

A bump on my genitals was red and then turned black. What could it be?

What if you have something on your genitals that starts as one red bump and then turns black...and it hurts?