Detailed answer

Melasma is a common skin condition marked by dark patches on the skin, typically on the face, and is often triggered by hormonal changes and sun exposure. On the other hand, lip lichen planus is an inflammatory condition that affects the lips and oral mucosa, causing white, lacy lesions. While both conditions can cause pigmentation changes, they have different causes and require different treatments. It is important to consult with a dermatologist or healthcare professional to get a proper diagnosis and appropriate treatment for each condition.