Dr. William David Manahan MD

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...

What is encopresis?Encopresis is a disorder characterized by the involuntary leaking of poop due to chronic constipation. This disorder is usually observed in children 4 years old and above.In encopresis, the wall and the nerves of the bowel are stretched when poop is held on for a longer time. This...

Shingles is a contagious viral infection that is caused by the varicella zoster virus, the same virus that causes chickenpox. This virus affects a particular nerve section, causing painful rashes on the skin connected to that particular nerve. The rash normally appears in a form of a band on any...

Is diarrhea a sign of early pregnancy?Diarrhea is a very common sign of early pregnancy. Every woman is different and so are her experiences of pregnancy. Not every woman experiences the same symptoms. Hence, diarrhea is also not a symptom that every pregnant woman experiences, although it’s quite...

Physical pain brought about by back pain can sometimes be unbearable making sitting, standing or walking a painful activity to undertake. Other aspects of your life might be affected too, such as sleep or your overall mood. Your daily life activities like study or work can also be affected resulting...

Sinusitis is a common infection, although most people who suffer from the condition use ineffective treatments. Before going to the pharmacy, you should first learn about the appropriate treatment for your condition.Sinuses are tiny openings found in the skull and are usually filled with air. They...