Dr. John Calvin Horner M.D.

Hypothyroidism is a very common condition in which the thyroid gland is unable to produce adequate hormones to maintain the metabolic levels of the body. Having a low amount of thyroid hormones in the blood affects the energy production in cells. A decrease in thyroid hormones leads to fatigue and...

Uncontrollable shivering is characterized by the rapid shifting between muscle relaxation and contraction. It is through these contractions that the body warms itself up when exposed to cold. Shivering is not always accompanied by fever. In some cases, shivering may occur before the onset of...

Diabetes comes with a lot of signs, so it is important to recognize the signs and symptoms before it is too late. It's important to see your doctor before the symptoms become severe. Type 2 diabetes symptoms often develop slowly and most people don’t even know it. It is really important to get a...

The menstrual cycle normally happens every month with a series of monthly changes that occur in a woman’s body in preparation for the chance of pregnancy. Every month, women go through the process of ovulation, wherein one ovary releases an egg. When the egg is not fertilized, the uterine lining...

Irritable bowel syndrome (IBS) is an abdominal disorder, which is characterized by pain, discomfort, interfered bowel habits (diarrhea and constipation), cramping, and bloating. Although IBS symptoms are persistent, there are many things that can be done to suppress its effects. IBS does not...

What is a vaccine?Vaccines are products that enable a person to develop immunity against certain diseases. A vaccine can be given through needle injections, by aerosol, or by mouth. The polio vaccine is given in the form of mouth drops that contain live but weakened organisms. The vaccine gets into...