CAUSES OF HEEL PAIN
1) Plantar fasciitis
2) Calcaneal apophysitis
3) Calcaneal spur
4) Nerve entrapment
a) Tarsal tunnel syndrome
b) Medial calcaneal nerve entrapment
c) Baxter's nerve entrapment (inferior calcaneal nerve)
d) Medial plantar nerve entrapment
e) Lateral plantar nerve entrapment
5) Achilles tendinitis
6) Plantar fasciosis
7) Achilles tendinosis
8) AICT (achilles insertional calcific tendinopathy)
9) Calcaneal stress fracture
10) Rheumatoid arthritis
11) Reiter's syndrome
12) Ankylosing spondylitis
13) Heel fat pad atrophy
14) Periostitis
15) Referred pain (pathology elsewhere in the body resulting in heel pain)
16) Lumbosacral disc disease, especially L5, S1
17) Infection of the heel bone (calcaneus)
18) Arterial insufficiency
19) Biomechanical strain
20) Myositis
21) Calcaneal bursitis
This is not mean to be an all inclusive list as there are other causes of heel pain. Plantar fasciitis is the most common cause but, if persistent or if not responding to treatment, a more thorough workup is needed.