 [ Symptoms ] painful nodule on bottom of foot two more now any type of stretching causes excruciating pain [ Disease ] hi this seems to be a connective tissue nodule disease its some what similar to the carpal tunnel and trigger finger diseases you had earlier the deep fascia and connective tissue around the tendons  muscles becomes nodular causing hinderance in the path of working tendons you may have partial tear of tendon in sole get a usg  mri done to see whats wrong you may need surgical repair for this thanks