Trichomonas is a widespread STD, mainly affecting women from their teens to their thirties. You get it by having unsafe sex, but possibly also by a shared towel. It’s not really serious, but can be uncomfortable. It’s often seen in conjunction with gonorrhea and chlamydia.
The first symptoms may appear a few hours after exposure, but this can also take six months. Many guys don’t have any symptoms.
With girls typical symptoms are a foul smelling, bubbly yellow, green or grey discharge from the vagina, itching and red inner lips and a frequent urge to urinate. It can resemble a yeast infection. Intercourse is often painful.
Guys, when symptoms are present, usually also have a frequent urge to urinate, while peeing may be painful. There may also be a discharge from the penis.
It’s treatable with antibiotics.