To tell if you have trichomoniasis, your doctor will do a pelvic exam and lab test. During the pelvic exam, your doctor may be able to see small red sores inside the vagina or on the cervix. Your doctor will also take a fluid sample from the vagina to look for the parasite under a microscope or to send to a lab. Other tests, like a vaginal culture or DNA test can also be used for testing.
If you have trichomoniasis, ask your doctor if you should be tested for other STIs too.