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Excessive Sweating Treatment (Hyperhidrosis)
Excessive sweating, known medically as hyperhidrosis, can be treated with neuromodulator injections that block the nerve signals activating the sweat glands. A single treatment takes about 20 minutes, requires no downtime, and typically reduces underarm sweating for four to six months.

How Hyperhidrosis Treatment Works
Sweat glands are switched on by a nerve signal. A neuromodulator interrupts that signal at the point where the nerve meets the gland, so the gland is not activated and does not produce sweat in the treated area.
A grid of small injections is placed just under the skin across the underarm. The effect is local. Your body continues to regulate temperature normally everywhere else.
Who This Treatment Is For
This is for patients whose sweating goes beyond normal and interferes with daily life:
- Sweating through shirts regardless of temperature or activity
- Keeping a change of clothes at work
- Avoiding certain fabrics or colors
- Antiperspirants, including prescription strength, not working
In Florida this is not a small quality-of-life issue. Patients often describe planning their wardrobe and their day around it, and many have never been told it is treatable.
What to Expect
Your provider may perform a simple starch-iodine test to map the most active areas. The underarm is then treated with a grid of small injections using a very fine needle. The whole appointment takes about 20 minutes.
There is no downtime and no restriction on activity afterward.
Aftercare
Small bumps at the injection sites settle within an hour. Avoid deodorant and shaving for 24 hours, and skip the gym for the rest of the day.
Reduction in sweating usually begins within two to four days and reaches full effect at about two weeks. Most patients return every four to six months.
Session Length
About 20 minutes
Downtime
About 20 minutes
Session Count
One session, repeated every four to six months
Results Timeline
Two to four days, full effect at two weeks
Results Duration
Four to six months
Device or Brand
Neuromodulator injection
FDA Status
Neuromodulators are FDA approved for severe primary axillary hyperhidrosis

Frequently Asked Questions
How long does it last?
Typically four to six months for underarm treatment, which is often longer than the same product lasts for facial lines.
Will I sweat more somewhere else?
The treatment is local to the injected area, and clinically significant compensatory sweating elsewhere is not a common outcome of underarm treatment.
Does insurance cover it?
Some plans cover hyperhidrosis treatment when conservative measures have failed. Coverage varies, so check with your insurer before your appointment.

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Dr. Todd A. Besnoff, MD
Medical Director
Top Doctor in Tampa Bay
Dr. Besnoff has been referred to as one of the Top Doctors in Tampa Bay (as seen in the recent Tampa Bay Magazine Top Doctors issue) and Top 100 Aesthetic Provider in America! Dr. Besnoff has assisted and/or performed hundreds of thousands of surgical procedures since 1995 in specialties such as plastic surgery, gynecology, tissue donation and life-saving emergency treatments. In fact, Ultimate Image has been known to have performed more BOTOX® / Dysport® treatments in Tampa Bay than any other provider.
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