Dr. William J Johnston MD

What is bursitis?Bursitis is a condition that causes inflammation of the bursa. Once the bursa is inflamed, it starts swelling. It causes pain around the affected area. The condition affects any part of the body where there are bursae.What is a bursa?A bursa is a sac-like cavity filled with fluid....

IntroductionHormones are a special kind of chemical messengers in the body that are created by the endocrine glands. These chemical messengers control and coordinate complex processes in the body, such as growth, metabolism, fertility, and reproduction. Hormones can also influence the body's immune...

People suffering from eating disorders go through intense pain and suffering. But they don’t go through this alone. Family member and friends also go through the pain. It is usually tough on someone to watch a loved one destroy themselves slowly when there is little they can do to help without...

Athlete's foot is an infection caused by a fungus, which affects the skin of the foot. This fungal infection is one of the most common skin problems. The infection starts from the toes and may spread to other areas of the body. The foot may start becoming itchy and scaly. The skin may also develop...

Most of the time, a fever doesn’t indicate a serious problem. However, it can be alarming and frightening if a child’s body temperature increases dramatically. Oftentimes, fever is the body’s way of fighting infections. Although not all fevers need treatment, a high fever can make children...

What is biotin?Biotin is a water-soluble vitamin also known as vitamin B7. This vitamin is critical for an organism's growth and development. It also serves as a coenzyme of carboxylase enzymes and is involved in the metabolism of carbohydrates, fatty acids, and amino acids. Biotin is required to...