About 50-90% of the guys has symptoms after infection. The symptoms are milder than in gonorrhea and may appear 1 to 3 weeks after exposure. Possible signs:
Burning feeling while peeing.
Watery or pus-like discharge from the penis.
Burning and itching around the opening of the penis.
Swollen or tender testicles.
The anus may itch and there may be discharge.
It can also cause inflammation of the lining of the eye and infect the throat from oral contact with an infected partner.
If left untreated it can cause infection of the epididymis.
If a guy discovers he has chlamydia he should warn his (former) sexpartners. Girls most often don’t know they are infected, so they are dependant on partners informing them.