yup swimming in the pool with chlorine can aggravate or trigger your eczema. Chlorine distroy your natural protective barrier of the skin and makes your skin even dryer, which you also might experienced. So be sure to shower immediately after u get out of the pool and moisturize your skin when your skin is still moist.View Thread
Yup as other suggested Sunscreen is must. So if nothing is working on you you may need to explore about other conditions that might be aggravating your melasma like oral contraceptive pills, hormone replacement therapy, and certain cosmetics that causes phototoxic reaction triggering melasma needs to be avoided.View Thread