Nikolsky sign is a skin finding in which the top layers of the skin slip away from the lower layers when rubbed.
The disease is more common is newborn babies and in young children under 5 years of age. It often begins in mouth and on neck, shoulder, arm pit, and in genital area. A child may be lethargic, irritable, and feverish. They may develop red painful blisters on the skin, which break easily.
Adults with disturbed kidney functions or with a weak immune system may have this sign. Your health care provider may use a pencil eraser or finger to test for Nikolsky sign. The skin is pulled to the side with a shearing pressure on the surface, or by rotating the eraser back and forth.
If the test result is positive, the very thin top layer of skin will shear off, leaving skin pink and moist, and usually very tender.
A positive result is usually a sign of a blistering skin condition. People with a positive sign have loose skin that slips free from the underlying layers when rubbed.
When to Contact a Medical Professional
Contact your provider if you or your child develops painful loosening, redness, and blistering of the skin, which you do not know the cause of (for example, a skin burn).
What to Expect at Your Office Visit
The conditions associated with Nikolsky sign can be serious. Some people need to be admitted to the hospital. You will be asked about your medical history and given a physical examination.
Treatment will depend on the cause of the condition.
You may be given:
- Fluid and antibiotics through a vein (intravenously)
- Petroleum jelly to decrease pain
- Local wound care
Healing of the skin blisters occurs in about 1 to 2 weeks with no scarring.
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Grayson W, Calonje E. Infectious diseases of the skin. In: Calonje E, Brenn T, Lazar AJ, Billings SD, eds. McKee's Pathology of the skin. 5th ed. Philadelphia, PA: Elsevier; 2020:chap 18.
Levin LE, Garzon MC, Lauren CT, Morel KD. Dermatology. In: Polin RA, Ditmar MF, eds. Pediatric Secrets. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 4.
Marco CA. Dermatologic presentations. In: Walls RM, Hockberger RS, Gausche-Hill M, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 9th ed. Philadelphia, PA: Elsevier; 2018:chap 110.
Review Date 2/18/2022
Updated by: Ramin Fathi, MD, FAAD, Director, Phoenix Surgical Dermatology Group, Phoenix, AZ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.