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.
melanocyte stimulating hormone gets its name because of its effect on melanocytes skin cells that contain the black pigment melanin in humans melanocytes are responsible for moles freckles and suntan and if they turn cancerous melanomain most vertebrates msh is produced by an intermediate lobe of the pituitary gland its secretion causes a dramatic darkening of the skin of fishes amphibians and reptilesn humans melanocytes are responsible for moles freckles and suntan and if they turn cancerous melanoma in most vertebrates msh is produced by an intermediate lobe of the pituitary gland its secretion causes a dramatic darkening of the skin of fishes amphibians and reptiles