<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have had lower back ache for the last month or so which I would describe as a pre menstrual ache. It also seems to radiate to my lower abdomen. I have had clearyellowcreamy discharge for about the same time, not offensive at all. My abdomen is tender on the right side when pressed. I am not pregnant. What could this be?  <response>: Thank you for sharing your complaint, if you have pain on backflank with abdominal pain which radiate to pelvisbladder and sometimes it may be associated with burning or difficulty in urination, you should keep in mind possibility of ureterickidney stone. Tenderness and pain on right William fossa also indicates of appendicitis. So you should first confirm diagnosis by blood urine investigation and also sonography of abdomen and pelvis. After final diagnosis take medicine rather than taking medicines randomly. Low back pain may be due to muscular pain. For temporary relief you can take analgesics like ibuprofen or muscle relaxant like diclofenacparacetamolchlorzoxazon, with omeprazolerabeprazole.it will relieve back pain and abdominal pain. Hope this answer will be helpful to you. For more queries please dont hesitate to ask. Get well soon dear friend 