Diarrhea can range from a mild, temporary condition to a potentially life threatening one. Common causes include viruses, bacteria, and parasites. Diarrhea is characterized by loose or watery stools.

What causes mental illness? It's complicated. Although the exact cause of most mental illnesses isn't known, research shows they often come from a complex mix of biological, genetic, psychological ...

“The ‘nearly’ equal hours of day and night are due to refraction of sunlight or a bending of the light's rays that causes the sun to appear above the horizon when the actual position of the ...

Less commonly, it can stem from conditions such as kidney failure and liver disease. Some causes of itching affect just one area, while others can make you feel like your whole body is itching.

Blood clotting disorders are inherited or acquired conditions that affect the body’s ability to form blood clots. Some types of blood clotting disorders may cause excessive formation of blood clots, ...

Scientists are actively studying the causes of aging. Most agree that a major cause of aging is the shortening of telomeres, which cap the ends of chromosomes — the strands within cells that ...

What Causes Brain Fog? 8 Possibilities Brain fog isn’t an official diagnosis but rather a general term for common subjective brain issues. It also isn’t one specific thing but a constellation ...

After developing ischemia in her right hand and foot, GTN patches were applied, but therapy caused a peak in methemoglobin (MeHb ... cyclic guanosine monophosphate (cGMP) levels, which causes ...

Some of these changes may have outside causes like radiation or cancer-causing chemicals, but most often the reason they occur isn't clear. Many of these gene changes are probably just random events ...