Dermal Fillers

Dermal fillers are FDA-approved and used for the cosmetic treatment of fine facial lines, wrinkles, and folds. Injectable dermal fillers can also be used to plump or add volume to thin lips. Dermal fillers are composed of hyaluronic acid, a naturally occurring substance found in every living cell. Fillers contain synthetic gel forms of hyaluronic acid derived from non-animal sources and are highly compatible with the body. When the gel is injected, it acts like an inflated cushion to support facial structures and tissues that may have lost volume or elasticity with normal aging.

Hyaluronic acid also brings water to the surface of the skin to keep it looking fresh and supple. The gel is injected into the skin through a fine-gauge needle at the site of unwanted lines and wrinkles. While dermal fillers are generally safe, dermal filler treatments should be performed by a professional to avoid complications and serious side effects at the injection site.

Here at Knott Street Dermatology we offer the full line of Juvéderm and Restylane HA fillers.

Reserve your session with our expert dermal filler doctors in Portland today. 


Hyaluronic acid fillers are temporary dermal fillers that restore skin moisture and diminish signs of aging. It’s main ingredient, hyaluronic acid (HA) is a primary component of the skin and is responsible for that plump and hydrated look. Benefits of HA fillers include anti-aging, moisturizing, anti-wrinkle, restore skin elasticity, and treat eczema and redness.  HA fillers are safe and allergic reactions are rare with this type of filler because hyaluronic acid is naturally produced by the skin.

Hyaluronic acid fillers can last up to 18-24 months or longer. Like any cosmetic procedure, there is no guarantee of complete satisfaction, or that wrinkles and folds will disappear completely. Additional treatments may be required to achieve desired results, and visible outcomes will vary per patient. To maintain the desired effect, we recommend follow up treatments before the effects of the last treatment wear off.

Book your appointment with our experts now for the best lip fillers in Portland.

Areas treated:

  • Cheeks
  • Chin
  • Jawline
  • Jowls
  • Temples
  • Lips
  • Nasolabial folds
  • Perioral lines


  • Natural-looking and subtle results
  • Immediate results
  • Nonsurgical option for skin laxity and wrinkles
  • Overall youthful appearance
  • No downtime


  • Hydrate, Hydrate, Hydrate. Drink at least 60 oz of water daily starting at least two days before the treatment.
  • Discontinue blood thinning agents such as vitamin E, vitamin A, ginkgo, garlic, flax, cold liver oil, & fish oil.
  • Avoid aspirin, Advil, Motrin, Ibuprofen, Naproxen, Voltaren and other anti-inflammatory medications 7 days prior to procedure. Please consult a physician if you are taking these medications for a medical condition before discontinuing.
  • Avoid excessive sun exposure prior and after treatment.
  • Avoid topical products such as Tretinoin (retin-A), Retinols, Retinoids, Glycolic Acid, Salicylic acid, or other anti-aging or “bleaching” products 5 days in advance.

Filler Brands and Types Here at Knott Street Dermatology We Commonly Work With:


  • Restylane-L
  • Restylane Lyft
  • Restylane Contour
  • Restylane Defyne
  • Restylane Kysse
  • Restylane Refyne


  • Juvéderm Vobella
  • Juvéderm Voluma
  • Juvéderm Vollure
  • Juvéderm Ultra
  • Juvederm Ultra Plus



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.

Rachel Almada advanced Aesthetician from KNOTT STREET DERMATOLOGY

Rachel Almada LE,CAE

Rachael graduated from the Aesthetics Institute in 2020 and recently acquired a Bachelor of Arts from Portland State University. Coming from a dermatology background, Rachael has a passion for skin health and sun protection. Her favorite part about being an Advanced Aesthetician is helping patients reach their skin goals and watching their confidence build because of it. She understands that everyone’s skin requires its own unique approach whether it’s a treatment plan or a skincare regimen.

When she is out of the office, Rachael enjoys traveling, trying new food, making art, and doing pretty much anything outdoors – especially if it includes her Doberman-mix pup, Rubio!

Contact Us

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



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Frequently Asked Questions

Lip fillers are safe when administered by qualified and experienced dermal filler doctors. At Knott Street Dermatology, our doctors meet the required standards in training, skil to make your process completely secure. 

Consult with our experts to get the safest lip fillers in Portland, Oregon

The duration of lip fillers varies depending on factors such as the type of filler used, individual metabolism, and lifestyle factors. On average, lip fillers can last anywhere from 6 to 12 months before gradually dissipating.

Yes, absolutely. The extent of enhancement desired for your lips is entirely up to you. We have experienced medical professionals with years of expertise in dermal fillers that can help you achieve natural-looking outcomes.

At Knott Street Dermatology, the procedure involves a consultation with our dermal filler doctors to discuss your goals and medical history, followed by the application of a numbing cream to minimize discomfort. The filler is then injected strategically into the lips using a fine needle or cannula.

Get in touch with us now for the best lip injections in Portland, Oregon