To Evaluate the Therapeutic Effect of Laser Acupuncture in Patients With Acute or Subacute Post Stroke Shoulder Pain

Inclusion Criteria: * Beyond the age of 20. * Normal consciousness before and after stroke who can reply and fill in the questionnaire. * Subacute (subacute phase: 7 days to 6 months after stroke) and Chronic (chronic phase: more than 6 months after stroke) with shoulder pain after stroke and in post- stroke recovery period. * Stop taking painkillers for more than 1 day, * Without received intramuscular drugs (steroids, botulinum toxin, glucose, etc.) injections in the shoulder joint or around the shoulder for more than 2 weeks * Those willing to sign the written subject consent form. Exclusion Criteria: * Participants with shoulder pain symptoms before the stroke * Acute shoulder trauma on the affected side of shoulder pain in the past. * Surgery on the affected side of shoulder pain in the past. * Those who cannot complete the scale assessment due to aphasia, post-stroke depression, and obvious cognitive impairment. * Women who are pregnant or planning to become pregnant. * Those who have a history of epilepsy and are receiving anti-epileptic drug treatment. * Who are receiving any herbal or folk remedies related to shoulder pain. * Any other conditions deemed unsuitable in the assessment of the responsible physician. * Those who have not signed the written subject consent form.