The product instructions explicitly state not to apply it to irritated or damaged skin. Cracked heels, open fissures, redness, or any break in the skin barrier fall under this guidance. The menthol that gives the cooling sensation can sting or worsen irritation on compromised skin, and the fragrance components (present in the formulation) may trigger a reaction. If your heels are cracked, focus first on restoring the skin barrier — for example, with a plain, fragrance-free occlusive ointment (such as petrolatum or a urea-based foot cream without cooling agents) and protective socks at night. Once the skin is intact and no longer stinging, you can reintroduce this cream for its conditioning and refreshing effect. If cracking persists or is painful, consult a podiatrist or dermatologist before using any cosmetic product on the area.