A stye is a red bump on the edge of your eyelid that is painful and looks somewhat similar to an acne pimple. It forms when an oil-producing gland in your eyelid or eyelash follicle gets blocked, attracting bacteria that cause an infection. Styes are very …

Around 1 in 10 people have canker sores from time to time. These shallow sores appear in the lining of your mouth. While they’re not contagious, they can be irritating and even painful. Canker sores start as white or yellowish with a red border. They …

If you’re sexually active, you are at risk for sexually transmitted infections (STIs). STIs can cause various symptoms that can cause discomfort and be unpleasant to deal with. One sexually transmitted infection is chlamydia, which can cause detrimental reproductive effects in women.

If you have …

Trypophobia (which comes from the Greek words trypos for "holes" and phobos for "fear") is a fear response that is activated by viewing holes, specifically in an irregular pattern or cluster. This condition is incredibly common, with an estimated one in six individuals experiencing a degree …

Hemorrhoids are veins around your anus and inside of your rectum. Everyone has these veins, and they usually don’t cause any problems. But when the veins swell or become inflamed, they can cause pain, rectal bleeding, and itching. This condition, simply known as “hemorrhoids,” affects …

Celiac disease is an autoimmune condition that causes ingested gluten to damage the small intestine. Around the world, approximately one in 100 people have celiac disease, but most have not been diagnosed with it. If you have celiac disease, eating gluten — a protein in barley, rye, and …

Eosinophils are part of your immune system and help protect you from infection. However, if they are too high, they can trigger inflammatory reactions that cause asthma symptoms.

Doctors used to think of asthma as one disease, but they now realize that there are many different …

Crohn's disease is a condition that leads to chronic inflammation of the small intestine, large intestine, and/or colon. This disease impacts the health of the digestive tract, leading to symptoms such as diarrhea, abdominal pain, and weight loss. Over time, Crohn's can take a toll …

In the United States, pink eye (conjunctivitis) affects an average of 6 million people every year. Pink eye is an eye infection that results in inflammation in the tissues that line your eyelids (the conjunctiva). Different types of pink eye, including bacterial, viral, and allergic conjunctivitis …

In the United States, an average of 1 million people get shingles every year. If you’ve ever had chickenpox, there’s a good chance you’ll get shingles. This viral condition causes a rash and blisters on the skin, often in bands along one side …