Find possible causes of numbness or tingling in hands based on specific factors. Check one or more factors on this page that apply to your symptom. Numbness or tingling. 1  Affects both hands. 2  Affects one hand.  Is intermittent.
These cells produce melanin, the substance that gives skin its color. Skin with too much melanin is called hyperpigmented skin. Skin with too little melanin is called hypopigmented skin. Pale skin areas are due to too little melanin or underactive melanocytes. Darker areas of skin (or an area that tans more easily) occurs when you have more melanin or overactive melanocytes. Bronzing of the skin may sometimes be mistaken for a suntan.
When your skin is injured or broken, platelets clump together and form clots to stop the bleeding. When you do not have enough platelets in your blood, your body cannot form clots. A low platelet count may also be called thrombocytopenia. This condition can range from mild to severe, depending on its underlying cause.For some, symptoms can include severe bleeding and are possibly fatal if not treated.f your bone marrow is not producing enough platelets, you will have a low platelet count. Causes of low platelet production include: 1  aplastic anemia. 2  vitamin B12 deficiency. 3  folate (iron) deficiency. 4  viral infectionsâincluding the human immunodeficiency virus (HIV), Epstein-Barr virus, and chicken pox.