Chlamydia

Chlamydia is difficult to self-diagnose because it often times has no symptoms. Chlamydia is one of the most commonly reported STD in the world, but many people who have the disease do not know they have it. Luckily, chlamydia is often easily to cure but, if left untreated, can cause difficulties for women to achieve conception and to become pregnant. 

 

Syphilis 

Syphilis is a sexually transmitted infection that causes many long-term health problems such as arthritis, brain damage, and blindness. Infected people are often unaware that they are infected until symptoms begin to show. Infected pregnant women can also pass on the disease to their child in what is called congenital syphilis, which can cause birth defects and death to the baby. 

One of the biggest symptoms of syphilis is the development of large round sores around the genitals and mouth. Eventually infected people will develop a rash that will turn the palms of their hands and the soles of their feet a copper tone. Eventually syphilis will develop and cause severe problems in infected people in the heat, brain, and nerves. It can also result in paralysis, blindness, dementia, deafness, impotence, and death. 

Syphilis is diagnosed with a blood test and can be easily treated. A single dose of penicillin often time eradicates the disease in the body of a person infected for less than a year.