Need detailed history regarding pain. And as you have mentioned kidney failure as diagnosed condition better avoid NSAIDS( including ibubrufen ) for long durations.

Apply any spray like move or volini. Change ibuprofen to other Analgesic medicine

This treatment is being on bases of the information provided.  However I would like to examine & investigate you  in detail. -Control  Hypertension, Diabetes or  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. --. Keep no pillow under the head. --. Avoid painful acts & activities. -- .Do mild exercises for the backandlowerlimbs. --.(Take help of physiotherapist or you can visit my you tube channel Dr NC Gupta.)   & see  me and my yoga; & yoga simplified. Kindly subscribe to the channel to get notifications for further new information of your interest.  --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) DMC 3624  

Get a xray of lumbar spine AP/lateral Add tab. Myospaz

It might be Muscle Spasm Start Any Kind of Muscle Relaxant Tablet Hot fomentation Apply Gel Do Regular Exercise

Tablet Nucoxia mr Powergesic gel Rest Hot water bag massage