Excessive Sweating

What Is Excessive Sweating?

Hyperhidrosis is a condition where the sweat glands are overactive, producing more perspiration than the body actually needs to regulate temperature. Unlike normal sweating, which is triggered by heat or exertion, this type of sweating can occur spontaneously—even in cool environments or while resting. It commonly affects localized areas such as the underarms, hands, feet, and face, and can interfere with everyday life in both physical and emotional ways.

What Causes Excessive Sweating?

There are two primary categories of hyperhidrosis, each with different causes:

Primary hyperhidrosis. This form typically starts during adolescence and has no clear medical cause. It’s thought to be hereditary and most often affects specific areas like the palms, soles, and underarms.

Secondary hyperhidrosis. In this case, the excessive sweating is caused by an underlying issue such as hormonal changes, infections, or medication side effects. It may affect larger portions of the body and occur during both day and night.

Recognizing the Symptoms of Hyperhidrosis 

Excessive sweating can manifest in several noticeable and disruptive ways:

• Persistent sweating even when not exercising or exposed to heat.
• Noticeable sweat stains on clothing, especially in the underarm area.
• Having to change clothes multiple times a day to stay dry and comfortable.
• Avoiding handshakes, physical touch, or open-toed shoes due to excessive moisture.
• Feeling anxious or self-conscious in social settings due to visible perspiration.

Botox® for Hyperhidrosis

At Metropolis Dermatology in Pasadena, we offer Botox® injections as a safe, clinically backed treatment option for managing hyperhidrosis—especially for those who haven’t found relief with prescription antiperspirants.

How It Works

Botox is a neurotoxin derived from bacteria, commonly known for its cosmetic use in reducing facial wrinkles. In people with hyperhidrosis, the nerves that normally activate the sweat glands are overactive, triggering sweat far beyond what’s needed to cool the body. Botox temporarily blocks those nerve signals, significantly reducing sweat in the treated area—without affecting your body’s ability to regulate temperature elsewhere.

What The Studies Show 

Botox is FDA-approved to treat underarm sweating, with studies showing a more than 50% reduction in sweat that can last for up to 6 months.

It’s also used off-label to help with sweating in other areas:

• Palms: Research shows a 25–50% reduction, with effects lasting between 3 weeks and 6 months
  
• Face: May reduce facial sweating for 5 to 6 months; some patients report mild muscle weakness in the forehead
  
• Feet: Early studies are limited, but results are promising—over 70% of teens in one study reported being satisfied with their outcome. 

FAQs

Is Botox safe for treating hyperhidrosis?

Yes. Botox has been approved by the FDA for use in treating excessive sweating and is widely regarded as both safe and effective when administered by trained professionals.

When can I expect to see results from Botox?

Many patients start to notice improvement within a few days to a week after their appointment.

How long does the effect of Botox last for sweating?

Most patients experience relief for about 4 to 6 months following treatment. Maintenance sessions can be scheduled to sustain results year-round.

Are there different treatment options for hyperhidrosis?

There are a variety of medical approaches available to help reduce excessive sweating. Depending on the severity and underlying cause, treatment options may include:

• Prescription-strength antiperspirants – Stronger than over-the-counter formulas, these can help manage mild to moderate symptoms in localized areas.

• Oral medications – In certain cases, medication that affects the body’s sweat response may be recommended to help reduce overall perspiration.

• Surgical procedures – For severe or persistent hyperhidrosis, some individuals may consider surgery to remove or disable overactive sweat glands. While each of these treatments has its place, many patients are turning to a trusted, non-surgical solution that offers noticeable, long-lasting relief.

A consultation with a qualified medical professional is the most appropriate way to determine which option aligns best with your specific needs and symptoms.

Can hyperhidrosis be permanently cured?

There is no definitive cure, but the condition can be effectively managed with treatments like Botox and other medical options.

Do lifestyle adjustments help reduce excessive sweating?

Wearing breathable fabrics, reducing stress, and avoiding common triggers like caffeine may provide some relief—but medical treatments often offer more reliable and long-term control.