Cortisone injections may be of benefit for some people with plantar fasciitis, but they are not recommended for treatment of Achilles tendinitis, according to Foot Ankle Specialty Group. These are the two most likely causes of heel pain, says Mayo Clinic.
People with plantar fasciitis who experience substantial pain, and for whom more conservative treatments do not provide sufficient relief, may benefit from a cortisone shot, says Foot Ankle Specialty Group. Because cortisone injections into the Achilles tendon can weaken it, they are not given.
Pain felt at the heel's back, at the place of attachment of the Achilles tendon to the heel bone, is caused by Achilles tendinitis, according to Mayo Clinic. Pain located at the heel's underside is likely a result of plantar fasciitis. As there are numerous possible causes of heel pain, consulting with a health care professional as to its source is highly recommended.