Developed through inflamed wounds, post-inflammatory hyperpigmentation is usually tan, brown or black in colour. It is a condition in which there is an increased production of colour pigment due to an injury or inflammation to the skin.
Commonly known as sunspots, solar lentigines are usually brown in colour and they do not cause a change in skin texture. They are darker and more irregular in appearance as compared to freckles.
Melasma is a type of hyperpigmentation that occurs due to hormonal change. This can become darker during pregnancy. Patchy brown discolouration spreads across certain parts of the face, making the overall skin tone look dull.