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.
There are various ways in which to treat facial melasma. Laser skin resurfacing and chemical peels have risks involved. With laser treatments, scaring can occur as well as pigment loss where facial melasma is treated. Chemical peels can cause an allergic reaction. Stronger peels can make your skin burn or peel. Swelling or redness can occur from partial laser treatment, but is not permanent.