Patient presents with a chief complaint of recurrent headache consistent with migraine without aura.  The patient reports experiencing moderate to severe, pulsating pain, typically unilateral and localized to the frontotemporal region.  Pain is aggravated by routine physical activity and accompanied by nausea, photophobia, and phonophobia.  Headache duration varies from 4 to 72 hours.  The patient denies any visual disturbances, sensory changes, or other neurological symptoms preceding the headache, ruling out migraine with aura.  Frequency of attacks is reported as approximately two per month.  Symptoms meet the International Classification of Headache Disorders (ICHD-3) diagnostic criteria for migraine without aura.  Differential diagnoses considered include tension-type headache, cluster headache, and secondary headache disorders.  Based on the patient's history and clinical presentation, migraine without aura is the most likely diagnosis.  Treatment plan includes acute management with NSAIDs such as ibuprofen or naproxen sodium, and triptans like sumatriptan or rizatriptan as needed.  Preventive therapy will be considered if acute treatments are insufficient or headaches occur frequently.  Patient education provided on migraine triggers, lifestyle modifications, and medication management.  Follow-up scheduled in four weeks to assess treatment efficacy and adjust plan as needed.  ICD-10 code G43.0 assigned.