Acne is the most common skin disorder in the world. If you suffer from acne, you are not alone and many treatment options are available. Learn more about pimples, blackheads, and comedones with the Acne Quiz.

Chlamydia is the most common sexually transmitted disease in the U.S. Signs and symptoms of chlamydia, a bacterial infection, include vaginal discharge, abdominal pain, burning with urination, blood in the urine, and feelings of urinary urgency and frequency. Untreated chlamydia can cause pelvic inflammatory disease (PID), increased risk of ectopic pregnancy, and infertility. Chlamydia is diagnosed with a culture or by identification of the genetic material of the bacteria. Treatment of chlamydia consists of a course of antibiotics.

Diverticulitis (diverticulosis) is a condition in which the diverticulum or diverticula rupture in the colon causing infection. Change in diet and medical treatments such as antibiotics and surgery can ease the symptoms of diverticulitis (diverticulosis).

Most people with diverticulosis have few if any symptoms at all. When people do experience signs and symptoms of diverticulosis (diverticular disease) they may include

• abdominal pain,
• abdominal cramps,
• diarrhea,
• constipation, and
• bloating.

Diverticulitis is a condition in which diverticuli in the colon rupture. The rupture results in infection in the tissues that surround the colon. Treatment methods for diverticulitis  includes prescription medications, and in some cases, diverticulitis surgery.

Jock itch is an itchy red rash that appears in the groin area. The rash may be caused by a bacterial or fungal infection. People with diabetes and those who are obese are more susceptible to developing jock itch. Antifungal shampoos, creams, and pills may be needed to treat fungal jock itch. Bacterial jock itch may be treated with antibacterial soaps and topical and oral antibiotics.

Lyme disease is a bacterial illness, which is spread by ticks when they bite the skin. Initially the disease affects the skin causing a reddish rash associated with flu-like symptoms. It takes weeks to months after the initial redness of the skin for its effects to spread throughout the body. Lyme disease can be treated with antibiotics. Lyme disease can be prevented by using tick avoidance techniques.

Lyme disease is caused by the bacterium Borrelia burgdorferi transmitted to humans through infected deer ticks. Lyme disease symptoms include a bull's-eye shaped rash. See pictures of Lyme disease rashes and ticks that carry Lyme disease.

MRSA (methicillin-resistant Staphylococcus aureus) bacteria causes skin infections with the following signs and symptoms: cellulitis, abscesses, carbuncles, impetigo, styes, and boils. Normal skin tissue doesn't usually allow MRSA infection to develop. Individuals with depressed immune systems and people with cuts, abrasions, or chronic skin disease are more susceptible to MRSA infection.

It's the MRSA Quiz! For the carriers among us, you'd be surprised that the infectious superbug is lurking on this body part! Take the quiz and learn how to keep this Staph infection at bay.

Rocky Mountain spotted fever is a disease carried by ticks that can be fatal if not treated. See pictures of the symptoms of Rocky Mountain spotted fever here.

Rosacea is a skin disease that causes redness of the forehead, chin, and lower half of the nose. In addition to inflammation of the facial skin, symptoms include dilation of the blood vessels and pimples (acne rosacea) in the middle third of the face. Oral and topical antibiotics are treatments for rosacea. If left untreated, rhinophyma (a disfiguring nose condition) may result.

Sexually transmitted diseases, or STDs, are infections that are transmitted during any type of sexual exposure, including intercourse (vaginal or anal), oral sex, and the sharing of sexual devices, such as vibrators. Women can contract all of the STDs, but may have no symptoms, or have different symptoms than men do. Common STDs in women are:

• Gonorrhea
• Chlamydia
• Zika virus
• Genital herpes
• Hepatitis B
• Hepatitis C
• Pubic lice
• Scabies
• Genital warts

Treatment for STDs depends upon the type.

Sexually transmitted diseases (STDs) are infections transmitted during sexual contact. They may be caused by viruses, bacteria, or parasites. STDs in men cause no symptoms or symptoms like

• burning,
• itching,
• sores,
• rashes, or
• discharge.

Common STDs in men include:

• Gonorrhea
• Chlamydia
• Syphilis
• Hepatitis B
• Hepatitis C
• Genital warts
• Genital herpes

Some STDs in men are treatable while others are not. STDs are diagnosed with tests that identify proteins or genetic material of the organisms causing the infection. The prognosis of an STD depends on whether the infection is treatable or not. Use of latex condoms can help reduce the risk of contracting an STD but it does not eliminate the risk entirely.

A sty is a bump that forms on the eyelid as a result of a blocked gland. Styes may be caused by infections, burns, or trauma to the eyelid. Most styes resolve on their own. The application of warm compresses can speed healing. In some cases, steroid injection or incision and drainage may be necessary. Keeping the area clean and consuming a diet high in omega-3-fatty acids may help prevent the formation of styes.

A sexually transmitted disease caused by Treponema pallidum, a microscopic organism called a spirochete. See a picture of Syphilis and learn more about the health topic.

A urinary tract infection (UTI) is an infection of the bladder, kidneys, ureters, or urethra. E. coli, a type of bacteria that lives in the bowel and near the anus, causes most UTIs. UTI symptoms include pain, abdominal pain, mild fever, urinary urgency and frequency. Treatment involves a course of antibiotics.