Mohs Surgery

  • Medical Author:
    Gary W. Cole, MD, FAAD

    Dr. Cole is board certified in dermatology. He obtained his BA degree in bacteriology, his MA degree in microbiology, and his MD at the University of California, Los Angeles. He trained in dermatology at the University of Oregon, where he completed his residency.

  • Medical Editor: William C. Shiel Jr., MD, FACP, FACR
    William C. Shiel Jr., MD, FACP, FACR

    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

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How do I prepare for my Mohs surgery?

Your personal physician will let you know the preoperative instructions specific for your condition.

Smoking is discouraged for at least one to two weeks before surgery. Smoking can slow wound healing and cause more wound infections.

Heavy alcohol use is not advised at least one week before surgery. Heavy alcohol use can cause more bleeding and thin your blood. An occasional glass of wine or small cocktail may not cause severe bleeding. Your physician will want to know of any factors that may affect your surgery or wound healing.

For many typical outpatient Mohs surgeries in a physician's office, most patients are advised to eat a good breakfast on the day of surgery and take all of their regular daily medications. Patients are advised to wear comfortable casual clothes and bring a sweater or small blanket.

In most cases, patients are able to drive after most procedures and do not necessarily need a driver unless they feel uncomfortable. Diabetic patients may need to be more cautious about maintaining good blood sugars and avoiding dangerous lows in their sugars from fasting.

Since you will be in the office for several hours, you may want to bring some personal snacks, drinks, and reading or knitting material. Personal music headsets or iPods may also provide relaxation and help pass time between Mohs levels.

For surgery center or hospital-based procedures requiring any type of sedation or general anesthesia, patients may be required to not eat or drink anything past midnight the night before surgery. Your plastic surgeon or anesthesiologist will advise you of specific instructions before surgery.

Most patients continue all doctor prescribed medications including aspirin and any blood-thinning medication unless specifically advised otherwise only by the primary physician or plastic or Mohs surgeon. Patients with a significant history of stroke, heart attacks, or even heart pain (angina) under a doctor's care must discuss their medications with their doctor before making any changes. It is important to not discontinue blood thinners without a doctor's specific instructions because of a potential greater risk of a heart attack and/or stroke.

For otherwise healthy (non-cardiac and non-stroke patients) nonessential, nonmedically prescribed medications that thin the blood such as ibuprofen (Advil, Motrin), aspirin, vitamin E, garlic supplements, Alka-Seltzer, Pepto-Bismol, other aspirin-containing medications, etc., can be stopped at least seven to 14 days before undergoing Mohs surgery to minimize bleeding and bruising. These medications can thin your blood and make you more prone to bleed during and after surgery. Again, it is important to not discontinue or start any medication without a doctor's specific instruction.

Medically Reviewed by a Doctor on 6/8/2015
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