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.
Hard lump under skin can be caused by a common condition called angioedema, an allergic reaction that causes deep welts to form under the skin, specifically by the lips and eyes. The reaction can be triggered by some foods and medications. Cysts and nodules can as well be the cause of hard bumps on your face.