Frozen water bottle for foot pain: Using a frozen water bottle can be a simple way to soothe tired, achy feet. Rolling it gently under the sole combines the cooling effect of cold therapy with a light massage, which may help temporarily ease pain and discomfort associated with plantar fasciitis and heel pain. However, avoid prolonged exposure to extreme cold, particularly if you have circulation problems or reduced sensation in your feet. If the pain is severe, persistent or keeps returning, it is best to seek advice from a healthcare professional.