Scholl’s Complete Corn Removal Treatment Pen relieves the discomfort of corns and calluses without harsh scraping or filing. Its pain-free precision applicator delivers a clinically proven gel with a high concentration of trichloroacetic acid (TCA-Active™) that breaks down hard skin and promotes new, healthy skin: a 4-day treatment gives visible results and less discomfort within 7 days. Easy to use at home and suitable for adults and children over 4. Hold the pen vertically with the brush tip down, turn the dial clockwise to load gel, apply carefully to the corn or callus and let dry for 10-15 minutes. Repeat once a day for four days, and always read the instructions. Pack Contents 1x pen. Safety Warning The pen contains a strongly corrosive acid: apply the gel strictly to the area to be treated, as contact with healthy skin may cause burning – take extreme care. If gel touches healthy skin, wash with plenty of soap and water. Do not use on irritated, infected, reddened or inflamed skin, if you are hypersensitive to any ingredient, or if you are unsure whether the condition is a corn or callus. In case of irritation, redness or pain, wash the area with plenty of soap and water and consult your doctor or pharmacist.