A disease sexually transmitted can be dangerous for both you and your sexual partners. The more knowledge you have about these diseases and infections the better, as you can take actions to protect yourself. So here is the five most common infections and diseases, with some information, symptoms and their causes on your body.

Herpes Simplex
Herpes Simplex is a virus that comes in two forms, Herpes Simplex Virus 1 or Herpes Simplex Virus 2. The Herpes Simplex Virus 1 is the most common of the viruses and usually known as Cold sores, they are outbreaks of blisters or sores on the mouth, around it or on the nose. HSV-1 can contribute to genital herpes through sexual encounters but mostly genital herpes are contracted by HSV-2.
Herpes Simplex Virus 2 is a disease sexually transmitted and can cause blistering and sores on or around the genital area. Though many of the symptoms go unnoticed, some of them include:
Blistering and sores on the genital area, flu like symptoms,  itching and in women they can have virginal discharge. Even if you have no apparent symptoms you can still infect others with the virus.Though there is no cure of this Virus it can easily be diagnosed through blood tests or tissue samples and there are treatments that can make help the symptoms ease.
There are many website's and books that show sexually transmitted diseases pictures, including this virus.

Gonorrhea:
Gonorrhea is a common disease also known as 'the clap' and is transmitted via vaginal and seminal fluid. Some of its symptoms in women include: bleeding after a sexual encounter, pain or burning while urinating and the need to urinate frequently, vomiting,  bloody or ill colored discharge, cramps, and bleeding between menstrual cycles. In men the symptoms include: a puss like discharge, burning or painful urination and swollen testicles.
If left untreated Gonorrhea can have severe and irreversible consequences on your reproduction system and your body, some of these include: infertility of both sexes as this its main form of attack, it can also result in heart, joint and brain problems.
Luckily this disease is easily to cure with a bout of antibiotics.

Chlamydia:
Chlamydia is one of those sexually transmitted infections that is very common and can easily go undetected as it has little or no symptoms, but if you are one of the few that do have symptoms of this disease they usually is a discharge, swelling and frequent urination as well as pain in the abdominal area. This disease is a form of bacteria that lives in the fluid of both men and women and is easy to test for and it usually takes under one minute to perform. Chlamydia is curable through a bout of antibiotics. Again this disease can have irreversible effects on your reproductive system like infertility if it is not diagnosed and treated quickly.

Syphilis:
Syphilis is another disease sexually transmitted and is commonly mistaken for other diseases and illnesses. Syphilis symptoms work in four stages if it is left untreated, the first's ones symptoms include: painless sores that are usually called chancres. They usually appear on or in the genitals, the mouth, tongue or anus area as wells as others. Stage two symptoms include: a brown rash that usually shows on the soles of your feet and your palms but it can also appear elsewhere on your body. This rash is contagious and can be passed onto others. Other symptoms of this stage are fevers, hair loss and sore throats. This stage of Syphilis can last up to two years. The third stage of this disease is usually when all the symptoms disappear but your are still infected and can still infect other people. The fourth and last stage of Syphilis has symptoms that include: heart, brain, liver, joints and nervous system problems as well as the possibility of blindness and mental illness. All of the stages are and can be treated with penicillin shots. If left untreated it can and will eventually cause death. There are many website's and books that show sexually transmitted diseases pictures, including the sores and rashes from this disease.

HIV/AIDS
HIV or the Human Immunodeficiency Virus is another disease sexually transmitted as well as through the sharing of needles and other such items. It is the most feared virus of all as there is no cure and it can attack your immune system and lead to the infection of AIDS, Auto Immune Deficiency Syndrome. The symptoms of HIV is very flu like with fevers, fatigue, muscle aches and headaches. There are treatments that are given to people infected with HIV that will stop it from progressing into AIDS and give them a longer life but unfortunately for some people they become immune to the antibiotics. Most sexually transmitted infections will give you a greater chance of contracting the HIV/AIDS virus.

A disease sexually transmitted can be severe and life threatening if they are not treated quickly or if they can't be treated at all. The best way to prevent yourself from getting any sexually transmitted disease is by total abstinence from sex, using a condom properly or having a monogamous relationship with a non infected person. If you do think you have been infected, see your health care professional immediately and get tested.