<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, may I answer your health queries right now ? Please type your query here...hi,i hav just entered my third trimister n is alresdy suffering from a swere backech.i cant stand for more then 10 mins and the pain starts.it is in the lower back wat do i do???  <response>: Hello welcome to ChatDoctoryou must have developed LOWER BACK MUSCLE SPASM as pregnancy exerts extra weight n pressure on lower back muscles.kindly take following treatment 1 TABLET DICLOFENAC twice daily 2 TABLET CHLORZOXAZONE three times a day3 HOT FOMENTATION twice daily in the region of pain4 avoid lifting heavy objects5 sleep on a hard mattress and avoid lying down on back or abdomen rather sleep in a lateral position i.e. on sides6 use a LUMBAR BELT but dont tie it too tight as you are pregnant7 avoid Chat Doctor. 