Electrotherapy. These small electrical pulses are certainly not painful. They address soft tissue injuries by stimulating nerves and muscles.  Several treatments are offered for acute very low back pain, but solid proof for their reward is missing. Dependant on the proof, an affordable approach to treatment is explained in Table 4. https://www.theorthopaedicandpainpractice.com/alleviating-aches-exploring-lower-back-buttock-pain-relief-solutions-in-singapore/