If you have sex oral, anal or vaginal intercourse and genital touching you can get an STD, also called a sexually transmitted infection (STI). Straight or gay, married or single, you're vulnerable to STIs and STI symptoms. Thinking or hoping your partner doesn't have an STI is no protection, you need to know for sure. And although condoms are highly effective for reducing transmission of some STDs, no method is foolproof.

STI symptoms aren't always obvious. If you think you have STI symptoms or have been exposed to an STI, see a doctor. Some STIs are easy to treat and cure; others require more-complicated treatment to manage them.

It's essential to be evaluated, and if diagnosed with an STI — get treated. It's also essential to inform your partner or partners so that they can be evaluated and treated.

If untreated, STIs can increase your risk of acquiring another STI such as HIV. This happens because an STI can stimulate an immune response in the genital area or cause sores, either of which might raise the risk of HIV transmission. Some untreated STIs can also lead to infertility.

STIs often asymptomatic STIs often have no signs or symptoms (asymptomatic). Even with no symptoms, however, you can pass the infection to your sex partners. So it's important to use protection, such as a condom, during sex. And visit your doctor regularly for STI screening, so you can identify and treat an infection before you can pass it on.

Some of the following diseases, such as hepatitis, can be transmitted without sexual contact, by coming into contact with an infected person's blood. Others, such as gonorrhea, can only be transmitted through sexual contact.


Below are common STIs and their symptoms

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1) Chlamydia symptoms : Chlamydia is a bacterial infection of your genital tract. Chlamydia may be difficult to detect because early-stage infections often cause few or no signs and symptoms. When they do occur, they usually start one to three weeks after you've been exposed to chlamydia. Even when signs and symptoms occur, they're often mild and passing, making them easy to overlook.

Signs and symptoms may include

Painful urination

Lower abdominal pain

Vaginal discharge in women

Discharge from the penis in men

Pain during sexual intercourse in women

Bleeding between periods in women

Testicular pain in men

2) Gonorrhea symptoms : Gonorrhea is a bacterial infection of your genital tract. It can also grow in your mouth, throat, eyes and anus. The first gonorrhea symptoms generally appear within 10 days after exposure. However, some people may be infected for months before signs or symptoms occur.

Signs and symptoms of gonorrhea may include

Thick, cloudy or bloody discharge from the penis or vagina

Pain or burning sensation when urinating

Heavy menstrual bleeding or bleeding between periods

Painful, swollen testicles

Painful bowel movements

Anal itching

3) Trichomoniasis symptoms : Trichomoniasis is a common STI caused by a microscopic, one-celled parasite called Trichomonas vaginalis. This organism spreads during sexual intercourse with someone who already has the infection.

The organism usually infects the urinary tract in men, but often causes no symptoms. Trichomoniasis typically infects the vagina in women. When trichomoniasis causes symptoms, they may appear within five to 28 days of exposure and range from mild irritation to severe inflammation.

Signs and symptoms may include

Clear, white, greenish or yellowish vaginal discharge

Discharge from the penis

Strong vaginal odor

Vaginal itching or irritation

Itching or irritation inside the penis

Pain during sexual intercourse

Painful urination

4) HIV symptoms : HIV is an infection with the human immunodeficiency virus. HIV interferes with your body's ability to fight off viruses, bacteria and fungi that cause illness, and it can lead to AIDS, a chronic, life-threatening disease.

When first infected with HIV, you may have no symptoms. Some people develop a flu-like illness, usually two to six weeks after being infected. Still, the only way you know if you have HIV is to be tested.

Early signs and symptoms


Fever

Headache

Sore throat

Swollen lymph glands

Rash

Fatigue

These early signs and symptoms usually disappear within a week to a month and are often mistaken for those of another viral infection. During this period, you're highly infectious. More-persistent or -severe symptoms of HIV infection may not appear for 10 years or more after the initial infection.

As the virus continues to multiply and destroy immune cells, you may develop mild infections or chronic signs and symptoms such as:

Swollen lymph nodes — often one of the first signs of HIV infection

Diarrhea

Weight loss

Fever

Cough and shortness of breath

Late-stage HIV infection

Signs and symptoms of late-stage HIV infection include

Persistent, unexplained fatigue

Soaking night sweats

Shaking chills or fever higher than 100.4 F (38 C) for several weeks

Swelling of lymph nodes for more than three months

Chronic diarrhea

Persistent headaches

Unusual, opportunistic infections

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Gonorrhea symptoms vary in both men and women. Gonorrhea is also called the "drip" or "clap," Click on the link below to read more.
http://www.gigihealth.com/gonorrhea-symptoms-how-do-i-know-if-i-have-gonorrhea/