Diagnostic Imaging and Treatment of Lateral Plantar Pain

Imaging Recommendations

The American College of Radiology recommends starting with weightbearing radiographs as the initial imaging study to exclude other causes of heel pain, though radiography is typically insensitive for fasciitis diagnosis 1, 2
The combination of thickened plantar fascia and fat pad abnormalities on radiographs has 85% sensitivity and 95% specificity for plantar fasciitis 2

The American Academy of Family Physicians recommends continuing initial conservative measures if no improvement after 2-3 months, and considering cast immobilization or fixed-ankle walker-type device during activity 4
The American Academy of Family Physicians suggests considering corticosteroid injection, avoiding direct tendon injection, for refractory cases 4

The American Academy of Family Physicians advises against proceeding to surgery without adequate 3-6 month trial of well-managed conservative treatment 4
Avoid complete immobilization as this causes muscular atrophy and deconditioning, as recommended by the Praxis Medical Insights 3
Never inject corticosteroids directly into the tendon substance as this inhibits healing, reduces tensile strength, and predisposes to spontaneous rupture, as warned by the Praxis Medical Insights 3

The American Academy of Family Physicians suggests considering insertional Achilles tendonitis if lateral heel pain predominates, characterized by posterior heel pain with prominence medial/lateral to Achilles insertion, relieved by walking barefoot 4
The American Academy of Family Physicians recommends considering Haglund's deformity with bursitis if lateral posterior prominence with tenderness lateral to Achilles tendon, common in women 20-30 years old 4
The American Academy of Family Physicians advises considering tarsal tunnel syndrome or nerve entrapment if pain has neurologic quality or distribution, and referral for electromyography and nerve conduction studies if neurologic etiology suspected 4