Weed, insect, and disease control may also be required for pastures. A healthy, productive pasture will resist invasion from most poisonous weeds and provide good quality forage. When pastures are overgrazed, horses will eat the grass and legume species down to the soil, which allows weeds to take over.
1 Melasma can be triggered by birth control pills because it increases hormones throughout the body. # 2  This is one of the most common causes of melasma. 3  Pregnancy: During pregnancy the body will become very hormonal and skin conditions like acne vulgaris and melasma/chloasma become very common.
Treating Melasma with Non-Prescription Home Treatment. 1  1. Protect your skin from the sun. Apply broad spectrum sunscreen and take other measures to protect your skin from the sun. 2  2. Calm down. Stress can worsen hormonal imbalances, and if a hormonal imbalance is the cause of your melasma, finding ways to stress less can help treat your melasma.