Lower back pain. When little bow down?

Your pain is most likely due to muscle spasm/sprain after the weight lifting. Use simple painkillers to help reduce the pain. Use a hot water bottle or hot compress on the painful area 3-4 times a day. Keep active and mobile. Avoid lifting weights for 1-2 weeks. Do gentle stretching. If pain doesn't subside in a few days time, you will need to see a doctor.

This treatment is being suggested on bases of the information provided. However I would like to examine & investigate you  in detail. Control  Hypertension, Diabetes or any other metabolic disorder, if there is  any. Any way it may be tried, --. Dolokind Plus (Mankind) [Aceclofenac100 mg +Paracetamol 350 mg] 1 tab. OD & SOS. X 5 days. --. Caldikind plus  (Mankind) 1 tab OD x 10 days. (You may need help of your local doctor to get these medicines.) --. Fomentation with warm water. Let the part not be exposed to cold. --. Sleep on a hard bed with soft bedding. --. Use no pillow under the head. --. Avoid painful acts & activities. -- .Do mild exercises for  back and hips and knees. --.(Take help of a  physiotherapist). --Do not ignore, let it not become beginning of a major problem. --Do ask for a detailed treatment plan. Kindly make sure, there is no allergy to any of these medicines. --For emergency treatment visit nearest hospital. --Wish you a quick recovery & good health. --I hope, I have solved your problem to your satisfaction.  Dr N C Gupta MS (ortho)

That could be a muscle spasm Start Physiotherapy IFT Take rest for 5days In fact we need to check you for acute disc prolapse