Salicylic acid plasters are a strong topical treatment designed to soften and dissolve the thickened core of a corn by gradually breaking down excess keratin. The adhesive pad is applied directly over the lesion and often includes a built-in cushion that protects the area from friction, helping reduce pain while walking. They are typically changed every 48 hours and can provide noticeable improvement within 1–2 weeks when used consistently. These products are convenient and effective for many people, but may cause irritation if medication contacts surrounding healthy skin, and they should be used with caution — or under medical supervision — in individuals with diabetes, neuropathy, or poor circulation