If you sweat excessively from your underarms or hands, Botox can block the nerve signals that overstimulate your sweat glands, reducing sweat by up to 87% and helping you regain control over daily life.
Metropolis Dermatology offers physician-performed Botox injections for hyperhidrosis at multiple California locations, including Los Angeles, Brentwood, Pasadena, Costa Mesa, and San Jose.
What Is Hyperhidrosis and Why Does It Affect the Underarms and Hands Most?
Hyperhidrosis causes sweat glands to produce more perspiration than the body needs for temperature regulation. This overproduction commonly affects the underarms (axillary hyperhidrosis) and hands (palmar hyperhidrosis), areas with a high density of eccrine glands. Sweat occurs without heat, exercise, or obvious triggers, disrupting everyday activities such as handshakes, clothing choices, and work tasks.
Primary hyperhidrosis is the most common form and usually begins in adolescence or early adulthood. It affects approximately 4.8% of the U.S. population and often impacts both sides of the body symmetrically. Underarm sweating can soak through shirts within minutes. Hand sweating can interfere with writing, typing, or physical contact. Most over-the-counter antiperspirants fail to control symptoms in these patients, leading many to seek medical solutions.
How Botox Works to Treat Excessive Sweating in Armpits and Hands
Botox treats hyperhidrosis by blocking the release of acetylcholine, a neurotransmitter that activates sweat glands. When injected into the underarms or palms, Botox interrupts the signal between nerves and sweat glands, preventing sweat production in that area.
The U.S. Food and Drug Administration (FDA) approved Botox for axillary hyperhidrosis in 2004. While palmar and plantar (foot) sweating are considered off-label uses, clinical studies support their safety and effectiveness. Because Botox works only where it is injected, other areas of the body continue to sweat normally, preserving thermoregulation.
At Metropolis Dermatology, dermatologists use Botox to treat underarm and hand sweating with precision injection mapping to optimize outcomes and minimize side effects.
Botox Injection Zones, Units, and Duration of Results for Underarm and Hand Sweating
Botox treatments for hyperhidrosis target specific anatomical zones mapped according to each patient’s sweating pattern. For underarm sweating, treatment typically requires 50 units of Botox per axilla. For palmar sweating, the total dose ranges from 50 to 100 units, depending on hand size and severity.
Each injection deposits a small amount of neurotoxin just under the skin in a grid-like pattern. The procedure takes approximately 20 to 30 minutes. Patients often report results beginning within 3 to 5 days, with full sweat reduction occurring by week two. Effects typically last 4 to 6 months for most patients, with some experiencing benefits for up to a year.
| Treatment Area | Average Botox Units | FDA-Approved | Duration of Effect |
| Underarms | 50 per side | Yes | 6–9 months |
| Hands | 50–100 total | No (off-label) | 4–6 months |
Repeat treatments maintain dryness long term and are typically scheduled 1–2 times per year.
Clinical Benefits of Botox for Treating Hyperhidrosis
Botox significantly reduces sweat production in targeted areas, improving physical comfort, emotional confidence, and daily function. In clinical studies, over 80% of patients treated for axillary hyperhidrosis achieved at least a 50% reduction in sweat. Many experience complete cessation of visible sweating in the treated area.
For patients with palmar hyperhidrosis, Botox improves grip strength and manual precision while eliminating sweat-soaked handshakes or smeared writing. In both areas, the emotional impact is substantial. Patients report improved self-esteem, reduced social avoidance, and relief from chronic anxiety linked to public visibility of sweat.
Botox is repeatable, adjustable, and reversible, making it an ideal intervention for those seeking non-surgical management of chronic sweating. For patients who want to avoid permanent procedures such as sweat gland removal or microwave therapy, Botox offers a customizable, less invasive option.
Is Botox a Preventative Solution for Chronic or Early-Stage Hyperhidrosis?
Botox can serve as an early intervention for patients showing signs of chronic sweating before symptoms worsen or become socially limiting. While it does not cure hyperhidrosis, preventative use delays the need for more aggressive treatment and reduces the development of compensatory behaviors, such as avoiding physical contact or layering clothing.
Young adults, performers, professionals, and athletes may benefit from using Botox to manage sweat-related challenges before these issues affect quality of life or career performance. At Metropolis Dermatology, clinicians assess sweating severity, patient goals, and lifestyle demands to determine if Botox is appropriate for proactive care.
Safety, Side Effects, and Aftercare for Botox in the Armpits and Palms
Botox injections for hyperhidrosis are safe when performed by trained medical professionals using sterile protocols. Side effects are uncommon and typically mild. For underarm treatment, patients may experience minor bruising, swelling, or sensitivity at injection sites. For hand treatments, temporary muscle weakness can occur but often resolves within a few days to a week.
Patients resume normal activities immediately after treatment. No downtime is required. At Metropolis Dermatology, physicians tailor every injection plan to minimize risk and ensure precision, particularly in sensitive areas such as the palms. Aftercare includes avoiding vigorous exercise or heat exposure for 24 hours and monitoring for changes in muscle function or sensation.
Because Botox is a targeted treatment, it does not interfere with overall sweat regulation or thermoregulation. Only the treated area is affected.
Who Is a Candidate for Medical Botox to Treat Hyperhidrosis?
Botox is an effective option for individuals with primary focal hyperhidrosis, especially when topical or oral treatments have failed. Ideal candidates are adults in good general health who experience disruptive underarm or hand sweating that interferes with work, relationships, or quality of life.
Most patients qualify after documentation of failed responses to prescription-strength antiperspirants or other therapies. Botox is well-suited for those seeking non-permanent, minimally invasive control over sweating, with the flexibility to retreat as needed.
During consultation, Metropolis Dermatology physicians assess the severity of sweating, medical history, and goals to develop a safe, customized plan. Insurance coverage is often available, especially for underarm treatment when conservative therapies have not worked.
Why Choose Metropolis Dermatology for Hyperhidrosis Treatment in California?
Metropolis Dermatology combines medical precision with personalized care to deliver safe, effective hyperhidrosis treatment. Botox injections are performed only by trained dermatologists, not delegated providers, at state-of-the-art clinics in Brentwood, Downtown Los Angeles, Pasadena, Costa Mesa, and San Jose.
Each patient undergoes a thorough evaluation, sweat mapping, and unit planning. FDA-approved neurotoxins are used under sterile technique. Follow-up support is included to ensure that results meet expectations and any side effects are managed promptly.
With expertise across both medical and aesthetic dermatology, the team brings a holistic understanding of skin health, function, and confidence. Patients choose Metropolis Dermatology for its commitment to advanced care and long-term results.
Take Control of Excessive Sweating With Medical Botox
Excessive sweating affects more than the body; it affects how people connect, perform, and present themselves every day. Botox offers a proven solution for those seeking lasting relief from underarm or hand hyperhidrosis.
If you’ve struggled to manage sweating and are ready for a change, schedule a consultation with Metropolis Dermatology. Our team is here to guide your treatment with precision and support, helping you reclaim comfort and confidence in your daily life.
Frequently Asked Questions
Can I combine Botox for hyperhidrosis with cosmetic Botox treatments?
Yes, Botox can be used for both sweating and cosmetic goals in the same session. Treatment zones are evaluated separately, and dosing is adjusted to maintain both safety and desired outcomes.
How does Botox compare to miraDry for underarm sweating?
Botox is temporary and non-invasive, while miraDry is permanent but uses heat to destroy sweat glands. Botox allows for flexible dosing and adjustments, making it ideal for patients who prefer non-permanent options.
Will I sweat more in other areas after treating hyperhidrosis with Botox?
No, compensatory sweating is not caused by Botox. It occurs more with surgical treatments. Botox affects only the treated areas and does not increase sweating elsewhere in the body.
How soon after Botox can I resume wearing deodorant?
You can resume using deodorant 24 hours after treatment unless your dermatologist advises otherwise. Avoid applying strong antiperspirants immediately after injections to prevent irritation at the injection sites.
Can teens receive Botox for hyperhidrosis?
Yes, Botox can be safely used in teens with severe hyperhidrosis when other treatments fail. A medical consultation is required to assess eligibility, treatment goals, and potential insurance coverage.