Plantar Fasciitis — The Sharp Pain of the First Morning Step
Table of Contents
Anatomy and function of the plantar fascia
The plantar fascia is a thick fibrous tissue that fans out from the medial calcaneal tubercle to the base of the five toes. When the foot pushes off the ground during walking and the toes dorsiflex, the plantar fascia becomes taut and raises the arch of the foot — this is the windlass mechanism. Thanks to this mechanism, the foot becomes a rigid lever that efficiently generates propulsion.
Why the first morning step hurts the most
During sleep, the ankle naturally rests in plantarflexion (toes pointing down), so the plantar fascia stays contracted for several hours. When you take your first step in the morning, the contracted fascia is suddenly stretched, and microtears at the calcaneal attachment recur, producing sharp pain. A characteristic feature is that the pain gradually eases after a few minutes of walking as the fascia stretches out.
Risk factors
Major risk factors include occupations involving long periods of standing (teachers, retail workers), being overweight, flat feet or high arches, tightness of the calf muscles (gastrocnemius, soleus), and wearing shoes without cushioning. It also occurs after a sudden increase in exercise (weekend hiking, taking on a marathon).
Korean medicine treatment approach
- Acupuncture: Direct needling of the tender point on the medial calcaneal tubercle, with supportive needling at Taixi (KI3), Yongquan (KI1), and Sanyinjiao (SP6). Electroacupuncture (mixed 2–100 Hz) simultaneously suppresses pain and improves blood flow.
- Pharmacopuncture: Anti-inflammatory pharmacopuncture is injected into the plantar fascia attachment to reduce local inflammation. Placental pharmacopuncture also promotes tissue regeneration.
- Herbal medicine: Modified Danggui-sayeok-tang improves blood flow to the lower extremities, while Samul-tang combined with Imyo-san clears damp-heat.
Stretching and insoles
Right after waking, sit on the bed and pull the sole of the foot with a towel — this plantar fascia stretch together with wall-supported calf stretches should be done daily. Wearing custom insoles that support the arch and a heel cushion pad reduces stress at the calcaneal attachment. Even indoors, cushioned slippers are better than walking barefoot.