Tag: Blister

Over 90% of the U.S. population has been exposed to the herpes simplex virus that causes cold sores. For those who experience outbreaks, the question, 'Does Abreva work after the blister appears?' is a common one, and the answer lies in understanding the drug's mechanism of action and the cold sore's lifecycle.

Cantharidin, a topical treatment for warts and molluscum, causes a controlled, superficial blister to form underneath a treated lesion within 24 to 48 hours. This blister formation is the definitive sign that cantharidin is working and the treatment process is underway. The subsequent shedding of the lesion with the blister indicates that the medication has successfully prompted the body to remove the unwanted skin growth.