The abductor hallucis muscle is located on the bottom of the foot. It can cause pain in the ankle and heel. There is a deep aching pain in the heel and ankle when trying to rest.
The piriformis muscle contributes to pain in the low back, buttocks, hip, and hip joint, pelvic area, and pain down the back of the thigh.
The soleus muscle can cause and contribute to pain in the heel, ankle and back of the knee. It can also cause pain in the low back on the same side of the affected leg. Dysfunction of the soleus muscle can also contribute to swelling in the foot and ankle. Occasionally a trigger point at the bottom and outside of the muscle can contribute to pain in the jaw and side of the head.
The tibialis posterior muscle can cause and contribute to pain in the lower leg just above the heel. This pain will often extend into the heel and the bottom of the foot. The pain will sometimes extend up into the lower calf. If you have fallen arches, you should check the tibialis posterior for trigger points and tightness because dysfunction of this muscle will allow your ankles to collapse inward.
The abductor digiti minimi muscle can cause ankle pain that is similar to a sprained ankle. Pain is felt on the outside of the heel and ankle.