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Cantharidin After-Care

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Care for Cantheridin

Instructions for after-care with cantharidin

Cantharidin, composed from the blister beetle, creates localized blistering of the skin where treated.

What to expect after treatment:

  • The treated areas need to be washed with soap and water in four (4) hours or sooner if lesions start to blister or there is pain. The area(s) may be tender for several days.
  • It is normal for the area(s) to be red and possibly blister or erode over the next few days.
  • You may get the area(s) wet and continue your normal daily activities. If the blisters are large or cause a problem, please call the office. If the blisters break or crusting occurs, cover it with Vaseline and a band-aid and change daily until it heals (approximately 7 days).


If you call the office after hours and need to speak with a doctor, the answering service will take your call and contact the doctor that is on call. The doctor will return your call as quickly as possible. If it is a true emergency, contact or go to the nearest Emergency Room.

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Have questions or concerns? Please call us at 856.627.1900

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