The body always sweats to reduce its temperature in different areas. There are people who have very high sweating levels and sweat heavily on hot days and when they are very active in different areas, especially under the arms. This problem is scientifically known as hyperhidrosis, which occurs as a result of excessive irritation of the sweat glands under the skin. Physiologically, the body needs a neurotransmitter called acetylcholine to sweat. To fix this, many doctors and specialists suggest injecting Botox into the armpits.