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Condition Guide

Understanding
hyperhidrosis
and how to treat it.

Hyperhidrosis causes excessive sweating beyond what the body needs for temperature regulation. It affects 4.8% of the US population — and The Fischer is an FDA-cleared treatment that works at home.

4.8%
of US population affected
98%
patient success rate
2 wks
to see results
See The Fischer Check insurance coverage
What is it

Hyperhidrosis explained

Hyperhidrosis is a medical condition in which the body produces more sweat than is needed for temperature regulation. It occurs when the eccrine sweat glands — concentrated in the palms, soles, and underarms — become overactive, triggering sweating independent of heat or exercise.

The condition is classified as either primary hyperhidrosis (no underlying medical cause, often hereditary) or secondary hyperhidrosis (caused by an underlying condition such as diabetes, menopause, or medication). Most patients treated with The Fischer have primary focal hyperhidrosis.

Genetic factors play a significant role — many patients have a family history of the condition. It affects all ages and is more common than most people realize, yet it remains underdiagnosed and undertreated.

Person with hyperhidrosis hiding their hands
Types

Where hyperhidrosis occurs

Hyperhidrosis typically affects specific focal areas. The Fischer treats all three.

Palmar Hyperhidrosis

Excessive sweating of the palms — the most common focal type. Makes handshakes, holding objects, and daily tasks difficult. Responds strongly to iontophoresis.

Plantar Hyperhidrosis

Excessive sweating of the feet and soles. Often occurs alongside palmar hyperhidrosis. Can lead to discomfort, odor, and difficulty with footwear. Treated simultaneously with palmar using The Fischer.

Axillary Hyperhidrosis

Excessive underarm sweating that soaks clothing and limits wardrobe choices. The Fischer's underarm attachments provide targeted treatment specifically for axillary hyperhidrosis.

Living with it

The real impact of hyperhidrosis

Hyperhidrosis affects far more than physical comfort. Its reach extends into every area of daily life.

Social & professional life
Handshakes, meetings, and presentations become sources of anxiety. Many patients avoid social contact or choose careers to minimize interaction.
Mental health & confidence
Chronic self-consciousness, anxiety, and depression are common. Studies link hyperhidrosis to significantly reduced quality of life scores.
Daily tasks
Holding a pen, using a phone, driving, or typing become genuinely difficult. Wet hands affect grip, precision, and basic functioning throughout the day.
Wardrobe & appearance
Clothing choices are limited to patterns and dark colors that hide sweat marks. Axillary sweating can damage fabrics and restrict self-expression.
The Fischer iontophoresis device for hyperhidrosis treatment
The solution

Iontophoresis with The Fischer

Iontophoresis is a non-invasive, drug-free treatment that uses a gentle electrical current to deliver mineral ions into the sweat pores — temporarily blocking them without harming the glands. It is the most widely recommended at-home treatment for focal hyperhidrosis.

  • FDA-cleared and clinically validated
  • Metal-free, all-natural — no drugs, no surgery
  • Results typically within 1–2 weeks of consistent use
  • Treats hands and feet simultaneously
  • Underarm attachment available for axillary treatment
  • Covered by most major US insurance plans
How it works

Getting started with iontophoresis

Most patients complete their first treatment within 20 minutes. No clinic visits required.

Full treatment guide
1
Fill the trays with tap water
Plain tap water is all that's needed. The minerals naturally present in tap water carry the current into the sweat pores.
2
Place hands or feet in the trays
The Fischer's large trays accommodate both hands and both feet simultaneously — halving the total treatment time compared to single-area devices.
3
Run a 20-minute session
The device delivers a gentle, adjustable current through the water. Most patients feel a mild tingling. Sessions run 20–30 minutes.
4
Repeat daily until results are achieved
Most patients see significant reduction in sweating within 1–2 weeks of daily treatment. Maintenance sessions (1–2x per week) sustain the results long-term.
FAQ

Common questions

Quick answers about hyperhidrosis and treatment.

All FAQs
Hyperhidrosis cannot be permanently cured in most cases, but it can be effectively controlled. Iontophoresis provides long-term symptom management for the vast majority of patients. With consistent maintenance sessions, most patients maintain near-normal sweating levels indefinitely.
Hyperhidrosis is characterized by sweating that occurs without a physical trigger — at rest, in cool temperatures, or in low-stress situations. If you sweat excessively from specific areas (hands, feet, underarms) regardless of temperature or activity level, hyperhidrosis is likely. A physician can confirm the diagnosis, but most patients with primary hyperhidrosis are aware of it from an early age.
Most patients notice a meaningful reduction in sweating within 1–2 weeks of daily treatment. Full results typically develop after 2–3 weeks of consistent daily sessions. Once results are achieved, maintenance sessions (typically 1–2 times per week) are needed to sustain them.
Yes — many major US insurance plans cover The Fischer iontophoresis device as a medically necessary treatment for hyperhidrosis. Plans that commonly cover The Fischer include Tricare, Aetna, Cigna, United Healthcare, and Horizon BCBS. RA Fischer Co. handles prior authorization and eligibility verification on your behalf.
Hyperhidrosis is most commonly treated by dermatologists, but any licensed physician — including primary care providers and internists — can diagnose and prescribe treatment. For insurance coverage of The Fischer, you need a prescription from a licensed provider documenting the hyperhidrosis diagnosis.

Ready to stop excessive sweating?

The Fischer is FDA-cleared, covered by most insurance plans, and ships directly to your door. Our Treatment Specialists handle everything from eligibility to delivery.

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Further reading

Learn more about hyperhidrosis