The neurotoxin commonly known as Botox comes in two chemical forms. It is referred to as non-botulinum toxin A and non-botulinum toxin B. Toxin Type A is used for cosmetic reasons. In contrast, toxin Type B is used for the medical treatment of diseases affecting the muscular system. For example, the most common muscular disease treated with Botox is called cervical dystonia, a condition in which the muscles of the neck involuntarily contract, causing the head to remain tilted to one side. Historically, Botox was initially used to treat patients with crossed eyes (strabismus) or lazy eyes (amblyopia), as these conditions are also caused by improper muscular function. Over the recent years, Botox has been used to treat hyperhidrosis (excessive sweating) by blocking the chemical process responsible for sweat production. Additionally, certain conditions causing chronic pain have also shown clinical improvement with Botox treatments, like temporomandibular disorder (TMD) and migraines.