Excessive underarm sweating, known medically as axillary hyperhidrosis, can be uncomfortable and disruptive to everyday life. While antiperspirants may provide some relief, they are often not enough for people with more severe sweating. The axilla, or armpit, contains numerous sweat glands, each with a tiny muscle that pushes sweat onto the skin. By relaxing these muscles, Botox injections can dramatically reduce sweat production and provide long-lasting relief. The procedure itself is straightforward and usually takes about 30 minutes. After discussing the treatment in detail, including potential side effects and risks, your doctor will examine the underarm to identify the areas where sweating is most active—usually within the hair-bearing region. A grid of 1 cm squares is then drawn over the area, and a small amount of Botox is injected into each square. On average, this involves around 20 very small injections per armpit, using Botox on each side. Although Botox does not stop sweating entirely, patients usually notice a significant reduction, with many reporting that they no longer need deodorant at all. The results typically last six to nine months, and in some cases, just one treatment per year is enough to keep the condition under control. Because the underarm is such a forgiving area to treat, complications are rare, making this a simple and highly effective option for those struggling with excessive sweating.