It is unlikely for heel pain to go away by itself. If plantar fasciitis is left untreated, the pain may worsen and turn into a chronic condition. In general, the longer you wait to seek treatment for your heel pain, the longer it will take to heal. This is why it is advisable to seek out the learned opinion of a professional physician as soon as symptoms manifest in order to ensure that your pain is managed well for the best chance of a successful recovery.