Botox Injections for Excess Sweating (Hyperhidrosis)

Using Botox for Hyperhidrosis

Hyperhidrosis, or excessive sweating, is a medical condition that affects millions of people worldwide. While sweating is a normal bodily function that helps regulate body temperature, people with hyperhidrosis sweat excessively even when their body does not need to cool down. This condition can be socially and professionally debilitating, leading to embarrassment and even anxiety. Fortunately, there are treatments available, including Botox injections, that can help manage this condition.

Botox Injections for Excess Sweating Understanding Hyperhidrosis

Hyperhidrosis is a condition that affects approximately 3% of the world’s population, with an estimated 15.3 million people in the United States alone. The condition is characterized by excessive sweating that is not related to physical activity or heat. People with hyperhidrosis may experience sweating in their palms, feet, underarms, face, and other areas of the body. The sweating can occur at any time, even when a person is at rest or sleeping.

Hyperhidrosis can be classified into two main types: primary hyperhidrosis and secondary hyperhidrosis. Primary hyperhidrosis is the most common type and is typically localized to one or more areas of the body, such as the hands, feet, or underarms. Secondary hyperhidrosis, on the other hand, is caused by an underlying medical condition or medication and is not as common as primary hyperhidrosis.

Causes of Hyperhidrosis

The exact cause of hyperhidrosis is not well understood. However, it is believed to be caused by overactive sweat glands that produce sweat in excess of what the body needs to regulate its temperature. Certain factors may also trigger or exacerbate hyperhidrosis, including:

  • Anxiety and stress
  • Certain foods and drinks, such as caffeine and alcohol
  • Certain medications, such as antidepressants and blood pressure medications
  • Hormonal changes, such as those that occur during menopause
  • Medical conditions, such as hyperthyroidism and diabetes

Botox Injections for Hyperhidrosis

Botox, or botulinum toxin, is a neurotoxin that is derived from the bacterium Clostridium botulinum. When injected into the skin, it works by blocking the nerve signals that stimulate the sweat glands, reducing the amount of sweat produced in the treated area.

Botox injections have been approved by the U.S. Food and Drug Administration (FDA) for the treatment of primary axillary hyperhidrosis, or excessive underarm sweating. The injections can also be used off-label to treat hyperhidrosis in other areas of the body, such as the hands and feet.

The Procedure

Before undergoing Botox injections for hyperhidrosis, a consultation with a qualified healthcare provider is necessary. During the consultation, the provider will evaluate the patient’s medical history, perform a physical exam, and determine if the patient is a good candidate for the procedure.

If the patient is deemed a good candidate, the provider will schedule the injection session. The session typically takes less than an hour and involves several injections of Botox into the affected area. The number of injections required will depend on the size of the treatment area and the severity of the hyperhidrosis.

After the injection, the patient may experience some mild discomfort, swelling, or redness at the injection site. These side effects are generally mild and resolve within a few days.


Patients typically begin to see a reduction in sweating within a few days of the injection. The full effect of the treatment may take up to two weeks to become apparent. The results of Botox injections for hyperhidrosis can last for several months, with some patients reporting a reduction in sweating for up to six months or longer. However, the duration of the results can vary from person to person.

After the effects of the Botox wear off, the patient may need to undergo additional injections to maintain the results. Over time, some patients may develop antibodies to Botox, which can reduce the effectiveness of the treatment.

Risks and Side Effects

As with any medical procedure, Botox injections for hyperhidrosis carry some risks and potential side effects. The most common side effects include:

  • Pain or discomfort at the injection site
  • Swelling or redness at the injection site
  • Bruising at the injection site
  • Headache
  • Flu-like symptoms

More serious side effects, such as difficulty swallowing or breathing, are rare but can occur. Patients who experience any unusual symptoms after receiving Botox injections should contact their healthcare provider immediately.

Read our article Is Botox Safe?