Detailed answer

Melasma is a common skin condition that causes dark, discolored patches on the face. It primarily affects the epidermal layers of the skin and does not directly impact facial sensation. Melasma is believed to be triggered by hormonal changes, sun exposure, and genetic factors. While the condition can sometimes cause emotional distress due to its impact on appearance, it does not lead to any alterations in the nerves or sensory perception on the face. If you experience any changes in facial sensation, it is advised to consult with a dermatologist to determine the underlying cause.