Hyperhidrosis is a condition that causes the sweat glands to enlarge and cause excessive sweating. It can occur in sweat glands all over the body, including the hands and feet, but it is most common in the underarm area. Excessive underarm sweating or axillary hyperhidrosis can take a toll on one’s self-esteem and affect their quality of life. There is no cure yet for primary axillary hyperhidrosis but the good news is it’s possible to reduce sweating and treat hyperhidrosis with a number of treatment options to choose from. More importantly, excessive sweating is a medical condition so hyperhidrosis treatments must be performed by a professional.  

Female armpit injected for hyperhidrosis treatment | Knott Street Dermatology | Skin Care Center | Portland Oregon

A prescription called Drysol can be an effective remedy for treating excessive sweating. Drysol is a topical antiperspirant with 20% aluminum chloride that works by affecting the cells that produce sweat, causing the enlarged sweat glands to shrink down to their normal size. Injections of Botox (a purified form of botulinum toxin) are also an effective treatment for hyperhidrosis but do require continued maintenance. Botox is a popular treatment for reducing fine lines and wrinkles, but doctors can also use botox to treat hyperhidrosis.

The series of injections needs to be repeated about 2 to 3 times a year and is typically not covered by insurance. When Botox is injected directly into muscles surrounding the enlarged sweat glands in the axillary areas (armpits), it temporarily inhibits the sweat glands from producing excess sweat. Response is usually seen within 7 to 10 days after injections, and several sessions may be needed to complete the series and achieve the best results. You may go home immediately after your botox for excessive sweating treatment but you should avoid exercise or have hot baths or showers for the rest of the day. Your aesthetician may recommend follow up treatments to touch up any missed areas and to check for side effects. 

With Botox, you can stop excessive sweating in your underarms. Schedule a consultation with our doctors at Knott Street Dermatology in Portland, Oregon today and start your journey to self-confidence.



Checkout our before and after gallery where we feature a few our recent patients. 






Our team is made up of experienced professionals
excited to help and provide personalized care just for you.

Alicia McCarthy, ND

Dr. Alicia McCarthy earned her Bachelor of Science in Kinesiology degree from California State University of Fullerton in 2008 and her Naturopathic Medical degree in 2017 from National University of Natural Medicine in Portland, OR. The twelve years Dr. McCarthy spent working in emergency medicine as an EMT set the foundation for the provider she is today. She now specializes in aesthetic medicine, dedicating her continuing education and practice to staying current on the latest techniques and products. Dr. McCarthy believes in aging gracefully. She takes the time to sit down with each patient and find out what this means for them.

Prior to joining Knott Street Dermatology, Dr. McCarthy had her own practice in Lake Oswego focused on aesthetic medicine, hormone balancing, thyroid conditions, and IV medicine.

Originally from Southern California, Dr. McCarthy has lived in Portland for the last eleven years. When she is not working Dr. McCarthy stays busy with her two young kids, husky pup, and husband. They enjoy spending time outside, camping, swimming, and playing at the park.

Olivia | Knott Street Dermatology | Skin Care Center | Portland Oregon

Olivia Gill LE,CAE

Olivia graduated from Spectrum Advanced Aesthetics in 2015 and has been working full time as a Certified Advanced Esthetician and Laser Safety Officer for the last 6 years. Olivia’s favorite part about her job is helping her patients feel more confident in their own skin. She takes pride in tailoring each skin care regimen and treatment plan to fit everyone’s lifestyle and budget. When she’s not pampering patients, she enjoys camping, traveling, and quality time spent with her family, husband, and Corgi puppy- Ginger!

Contact Us

If you have any questions, concerns, or would like to schedule an appointment please let us know. 



FIVE STARS Rating | Knott Street Dermatology | Best Dermatologist | Portland OR

Our patients’ feedback is vital in our improvement. Please take a minute to leave us a review and let us know how your experience has been at Knott Street Dermatology.