The most common
side effects of
Aldara include:
minor skin pain, irritation, itching, redness, dryness, flaking, scabbing, crusting, scaling, swelling where the medicine was applied,
changes in the color of treated skin,
headache,
tiredness, and
nausea
https://www.rxlist.com/aldara-drug.htm#description
It is designed, essentially, to burn the warts off. If you have no warts, it will burn your skin.