Symptoms of insect bites and stings. An insect bite or sting often causes a small lump to develop, which is usually very itchy. A small hole, or the sting itself, may also be visible. The lump may have an inflamed (red and swollen) area around it that may be filled with fluid. This is called a weal.
Hormones and the Brain. That's not to say estrogen isn't a major player in regulating moods. Estrogen acts everywhere in the body, including the parts of the brain that control emotion. Some of estrogen's effects include: 1  Increasing serotonin, and the number of serotonin receptors in the brain.
Sometimes, birth control pills help migraines. Sometimes, they make headaches worse. How birth control affects migraines depends on the woman and on the level of hormones present in the pill she takes. A drop in estrogen levels can trigger migraines. Thatâs why some women get headaches just before their period, which is when estrogen levels dip. If you have these menstrual migraines, birth control pills might help prevent your headaches by keeping your estrogen levels stable throughout the menstrual cycle.