One of the best treatments for an acute back pain is to remain active as far as can be tolerated. Try to continue with your daily activities, though the natural inclination can be to stay in bed and avoid daily chores. The reason being, any kind of activities keep the nutrients and blood flowing to the affected part, reducing inflammation and thus lessons muscular tension.
You can even apply some ice or heat to reduce the pain temporarily. If the pain continues for a longer time, do visit Specialist Pain International Clinic, one of the best clinics in Singapore for the treatment of any sort of back pain.