The term 'hard growth on the foot' is referring to a CORN, which is a thickened area of skin that can form on the toes or feet due to friction and pressure. Corns are usually painful and can be difficult to treat. They are caused by wearing shoes that are too tight or that rub against the skin. Treatment typically involves using pads or cushions to reduce pressure on the affected area, as well as using medicated creams or ointments.