The number of hyperhidrosis treatment sessions required may vary depending on the individual and the severity of their condition. Typically, Botox injections for hyperhidrosis are administered once every 3 to 6 months, or as needed, to maintain the desired level of sweating reduction.    The number of injections required per session also varies depending on the area being treated and the individual's response to the treatment. For example, for underarm hyperhidrosis, typically, around 50 units of Botox are used per underarm. However, the actual amount used may vary based on the patient's individual needs.