Paraffin wax therapy, which uses a bath of molten paraffin wax, is one of the most effective ways of applying heat to improve mobility by warming the connective tissues. Wax therapy is mainly used on your hands and is often used by hand therapists in a hospital setting along with an exercise programme. You can also get advice on where to purchase wax baths privately. Paraffin wax has some potential therapeutic uses. Some salons and spas use it as a skin-softening treatment or pain relief for sore joints and muscles. The two main benefits of paraffin wax are its moisturizing or skin-softening properties and its use in heat therapy.