Dark spots formation is one of the most common skin problems seen in both young and old adults. Also known as hyper pigmentation, these dark spots vary colour from red to brown to slightly blackish in colour. These dark spots tend to occur in different parts of the body, mostly seen on the face, neck, shoulders, arms and back.
The chemical that given human skin its colour is known as melanin, and excess production of this chemical on the skin can lead to freckles and dark spots on the skin. Here are a few common causes of dark spots.