Dr. Fernando H. Rivera M.D.

Indigestion, also known as heartburn, is a common term used to describe the discomfort or pain felt in the upper abdomen just below the ribs. It is not a disease. It is merely a symptom and it can be just another symptom of many digestive problems. The main complaint of those who experience...

Arthritis is one of the oldest diseases known to humans. Arthritis can affect people and children of all ages. The pain and stiffness of the joints are serious symptoms indicating that the person may have some serious type of arthritis that needs urgent treatment. If the person delays the visit to...

What is zinc?Zinc is a mineral that plays an important role in many different chemical reactions in your body. The human body uses this mineral to fight off infections, maintain acid-base balance, promote growth and development, boost antioxidant activity, and regulate gene expression, among...

Cholera is an infection that is caused by a bacterium known as Vibrio cholerae, which attacks the small intestines. This disease is extremely contagious, especially in areas where there is poor sanitation or during disasters such as floods. It is capable of killing people who are infected within...

Extreme thirst is medically referred to as polydipsia, which is believed to be the first signs of diabetes. Polydipsia can also be accompanied by dry mouth, which could be constantly or temporarily experienced.In order for the body to function properly, it is important to drink an adequate amount of...

Petechiae are tiny dots that appear as red, brown, or purple in color beneath the skin. They are usually seen in clusters on the stomach, buttocks, arms, and legs. However, they may also appear inside the mouth or on the eyelids. Petechiae may indicate different conditions, which can range from...