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.
Moles are made of cells called melanocytes. Melanocytes are found scattered throughout our skin and are the cells that make our skin become tan by generating a pigment called melanin. A mole is made of many melanocyte cells clustered together. When a mole becomes cancer it is called melanoma.oles are made of cells called melanocytes. Melanocytes are found scattered throughout our skin and are the cells that make our skin become tan by generating a pigment called melanin. A mole is made of many melanocyte cells clustered together. When a mole becomes cancer it is called melanoma.