STD symptoms (Sexually Transmitted Disease symptom) are too general of a topic to cover without branching out across the different classes and types of sexually transmitted diseases.
The symptoms will of course depend on the particular sexually transmitted disease (STD) being discussed and their different characteristic symptoms.
Generally, an STD is an infectious disease (viral or bacterial) which is transmitted person-to-person through sexual contact. However, oral, vaginal, or anal penetration is not the only route of transmission.
Infection may spread through simple body-body contact and kissing or touching. Mother-to-infant transmission, contaminated food, water, needles, blood, or medical instruments are alternate routes of transmission.
Sexually transmitted diseases are amongst the most common infectious diseases and are usually only diagnosed following an episode of their specific sexually transmitted disease symptoms.
Bacterial sexually transmitted diseases (STDs) include syphilis, gonorrhea, nongonococcal urethritis and chlamydial cervicitis (chlamydia), lymphogranuloma venereum, chancroid, granuloma inguinale, and trichomoniasis.
Symptoms of STDs in women differ from symptoms of STDs in men. Also, the severity can differ greatly from individual to individual. Some infected individuals may not experience any STD symptom (asymptomatic) while still being able to transmit the disease to others. These individuals are often termed ‘carriers’.
Often, it is only after the newly infected individual has displayed an STD symptom that the carrier may learn that are infected with a particular STD.
Different STD types are covered below where more specific symptoms can be addressed.