Hyperhidrosis is another name for excessive sweating. This condition may either be primary( idiopathic) or secondary to underlying internal conditions.
Topical treatments-Aluminium Chlorhexahydrate (Drichlor): This roll-on product is applied directly to the areas in which sweating is excessive. The product is initially applied once at night and then reduced to three times a week. This product may cause irritation at the site of application.
Oral medications- Oral or systemic prescription medications are sometimes considered by physicians for the treatment of hyperhidrosis. Some of the medications that have been tried are anticholinergics, beta blockers, benzodiazepines, calcium channel blockers and clonidine hydrochloride . Theoretically, these medicines could help treat excessive sweating because they prevent the stimulation of all sweat glands and thus may limit overall sweating, but long-term use is not recommended because of serious side effects.
This uses a special device which is applied to the area of excessive sweating. Iontophoresis uses water to conduct a mild electrical current through the skin’s surface. It’s not entirely understood how or why iontophoresis works, but it’s believed that the electric current and mineral particles in the water work together to microscopically thicken the outer layer of the skin, which blocks the flow of sweat to the skin’s surface. Once this sweat output is blocked or interrupted, sweat production on the palms and soles is, often suddenly and dramatically, "turned off".
A latest innovation in the treatment of excessive sweating. Injections are given once in 6 months to a year, depending on when symptoms return. Botox may be used for hyperhidrosis of the axillae (armpits), palms or soles.
Sympathectomy - An operation which stops the nerve supply to the area of excessive sweating. It is not without its complications and should therefore not be considered as a first line treatment.
Further links: http://www.sweathelp.org