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 back and lower limbs --.(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  

Use cushion for sitting Lumbar support for car seat as u drive more use memory foam cushions for back and base.

Use donut cushion if your pain is localised to the tail bone otherwise take frequent breaks while driving and avoid jerks.

Tablet nucoxia mr Powergesic gel Use lumber belt while driving

Might be due to piriformis syndrome (Nerve Compression) or other conditions like sciatica