Thanks for posting your query.
Do you have history of fall or injury
in past week?
Have you done brisk exercise in past few days?
Do you have fever/ sore throat/ running nose/ itching in eyes/ cough?
There may be possibility of common cold/ muscle fatgue due to exercise/ myositis
You should consult with physician and should go for CPK-MB.
You should take antibiotics (to prevent secondary bacterial infection), anti-inflammatory and anti-histaminics, if you are diagnosed as common cold.
You should take muscle relaxants with do strict bed rest
Dr. Mayank Bhargava