What should I do about dull, yellowish skin with melasma?

This condition can be treated with arbutin gel, hydroquinone, L-ascorbic acid (vitamin C), etc. Arbutin is a photosensitive substance and should preferably be used at night. Since hydroquinone may cause irritation, it's advisable to apply it on a small test area first and wait until the skin fully adapts before broader use. Additionally, sun protection is essential, especially during spring and summer. People who engage in outdoor activities or spend prolonged periods near windows should apply sunscreen, wear hats, or use umbrellas for shade.