What was the cause of muscke strain, were you doing any kind of physical activity or had a fall or something else. As treatment is based on the history of patient. Not just telling by your symptoms of pain.
Next Steps
But offcourse continue doing icing at that area 3-4 times a day for 10-15 min. And without telling your full history, don't do stretches.
Health Tips
Yoi can take pain killer medicine.