Excessive underarm sweating, also called primary axillary hyperhidrosis, can affect everyday life. It may soak through clothing, make handshakes uncomfortable, and cause embarrassment even when the weather is cool.

Botox is an FDA-approved treatment for severe underarm sweating when prescription-strength antiperspirants have not worked well enough. Instead of blocking muscles, Botox blocks the nerve signals that activate the sweat glands, helping reduce sweat production for several months.

How Many Units of Botox Are Usually Used for Underarm Sweating?

For most adults, the standard starting dose is:

• 50 units in each underarm
• 100 units total for both underarms

The treatment is usually given as a series of small injections spread evenly across each underarm. This allows the medication to reach the sweat glands throughout the treated area.

Some people may need a different amount depending on the size of the treatment area, previous results, and their individual treatment plan. Your provider will determine the appropriate number of units during your consultation.

Why Does Underarm Botox Require More Units?

Many cosmetic Botox treatments use fewer units because they target only a few facial muscles.

Underarm sweating is different. The medication needs to cover a much larger area, so small amounts are injected into multiple spots across each underarm. Because of this, hyperhidrosis treatment typically uses more units than cosmetic treatments for forehead lines or crow’s feet.

How Long Does Botox for Underarm Sweating Last?

Most people begin to notice less sweating within several days after treatment, with full results developing over the following couple of weeks.

Results commonly last about 4 to 6 months, although this varies from person to person. As the effects gradually wear off, sweating slowly returns, and repeat treatments may be recommended if appropriate.

Is Botox for Underarm Sweating Safe?

Botox has been approved by the U.S. Food and Drug Administration (FDA) to treat severe primary underarm sweating in adults when topical treatments have not provided enough relief.

Like any medical treatment, Botox can cause side effects. Temporary discomfort, bruising, or tenderness at the injection sites are among the more common effects. Your provider will review the potential benefits and risks before treatment and answer any questions you may have.

Learn More About Botox

If you’re researching Botox Seattle, understanding the number of units is only one part of the treatment. Our complete guide explains how Botox works, expected results, recovery, treatment areas, possible risks, and factors that can affect both cost and the number of units recommended.

To learn more and schedule a consultation at Allure Esthetic, call us at 206-209-0988.