Patient presents with complaints consistent with piriformis syndrome, characterized by buttock pain, sciatica pain radiating down the posterior thigh, and possible leg numbness or tingling.  Onset of symptoms was reported as [onset - gradual/sudden] and related to [possible cause - prolonged sitting, trauma, overuse].  Pain is described as [pain quality - sharp, dull, aching, burning] and exacerbated by [exacerbating factors - sitting, hip internal rotation, pressure on the buttock].  Physical examination revealed [positive findings - tenderness over the piriformis muscle, positive Freiberg sign, limited hip internal rotation and abduction, pain with the FAIR test].  Negative findings include [negative findings - absence of neurological deficits, normal reflexes].  Differential diagnoses considered include lumbar disc herniation, sacroiliac joint dysfunction, and hamstring strain.  Based on the clinical presentation and physical examination findings, the diagnosis of piriformis muscle pain syndrome is most likely.  Treatment plan includes [treatment plan - conservative management with physical therapy focusing on piriformis stretches, strengthening exercises, and myofascial release;  NSAIDs for pain management;  consideration for corticosteroid injection if conservative treatment fails].  Patient education provided regarding activity modification, proper posture, and home exercises.  Follow-up scheduled in [duration] to assess response to treatment and adjust the plan as needed.  ICD-10 code: M79.1 (Myalgia and myositis, unspecified).