Low vitamin D levels can cause muscle weakness, cramps and bone pain. You'll generally feel muscle weakness in your upper ...

If you regularly feel fatigued or weak, you may have an iron deficiency. Here are some common symptoms, causes and ways to ...

However, if left untreated, it can cause a weakened immune system or acquired immune deficiency syndrome (AIDS). Some people may not develop any symptoms after contracting HIV and could remain ...

Changes associated with anemia tongue are called glossitis, otherwise known as tongue inflammation. This article explains why ...