Boston Dermatologist
148 Carnegie Row
Norwood, Massachusetts 02062 US
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14 years experience
40 expert answers
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Board Certifications

Board-certified by the American Board of Dermatology


American Academy of Dermatology (AAD)


  • Post-Medical School Training

    Internship: General Surgery, University of California San Diego, 1999
    Dermatology Boston University and Tufts University, 2002
    Dermatologic Surgery / Mohs Surgery, Tufts University 2003
    Plastic Surgery, Yale University, 1990
    Dermatology, Stanford University, 1992

Treatments offered at Dermatologic Surgery at Dermatology Associates PC

Most popular answers from Niels C. Krejci, MD

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What is the best way to remove flat, dark moles from the face?

How you treat pigmented lesions on the face depends on what type they are. Your description fits better with flat "seborrheic keratoses" than with... READ MORE

After my last round of Botox, my forehead became extremely oily. What should I do?

Oil glands are regulated by hormones and not affected by Botox. The sweat glands however are affected by Botox - but their activity is reduced - that... READ MORE

Are these Varicose Veins or something more serious?

What you are describing is typical for varicose veins.When you stand up blood flows into them and they dilate. If you are resting on the couch with... READ MORE

What type of treatment is best to get rid of these wrinkles that extend diagonally from lower eye to upper cheek?

You have to distinguish between the lines that the eye muscles make when you squint, and the lines that form when your cheek moves up during a smile... READ MORE

If you are overfilled with Juvaderm injections, can you take only a bit out or do you have to take all of it out?

If you had several sites on your face injected then you can dissolve the Juvederm at each site individually and leave the other sites intact. ... READ MORE

Swelling has increased 6 days after kybella injection. Will my results be the same? (Photo)

Swelling in the morning is not always a reason for concern as body fluids tend to shift to the head and neck during the night. I would return to your... READ MORE

Masseter Muscle Hypertrophy? (photo)

You may want to consult your dentist if bruxism (grinding teeth) is part of your problem. Bruxism can have a range of causes and depending on the... READ MORE

Can I have Botox when I have rosacea?

Rosacea is a disease of the midfacial skin. Injection of botox into the muscles of the upper face is very unlikely to have an effect on your rosacea. ... READ MORE

Why would this doctor want to inject 25 units of Botox into my forehead for a brow lift? (Photo)

Botox can lift the eyebrows if you relax the muscles that pull the brows down. 25 units in the lower part of the forehead - between and near the... READ MORE

Should I have botox for neck pain? I had stroke 2 years ago and have constant headaches. Is this really a good option?

If you neck pain is caused by muscle spasms then Botox may be an option. This is usually done by neurologists not by cosmetic surgeons. Good luck ! READ MORE

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*Your results may vary. Any specific claims or permanence length of results vary for each patient and are not guaranteed.