### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
my husband went to the ER last night with rt side back pain.  it started in the left side and is now in his right mid back and stiffness in rt hip.  the doctor took chest xrays/no blood work/no urine sample.....  he cannot lay down and rest he can sit up and the pain is not so bad.  the doctor said she thinks it is muscle related and just said to take an antiinflammatory that he had in the past for back pain...mobic.  This has been going on for 4 days now and it seems even worse today.  it hurts when he tries to take in a deep breath or sneezes etc.  today he is running a fever and is having even more stiffness and pain.  he took the mobic last night and again this morning.  he says his jaws Could this be pleurasy?  Would that have shown on an xray?  Should he go back to the ER tonight?

### output:

Hi, thanks for using Chat Doctor It is unlikely that muscle related pain would cause a fever, there may be a slight increase in warmth in the muscles affected, but it should not cause a fever. This makes it less likely to be only muscle strain or trauma. Pleurisy is inflammation of the lining (pleura) of the lung, it would present on pain that is worse on taking a deep breath. There are different causes such as trauma, infection, pulmonary embolism, caused by a side effect of medication, due to autoimmune disease, heart disease, pneumonia. The changes on X-ray would depend on the cause of the pleurisy. In light of his fever and the fact that the pain is not relieved by his medication, you should consider going back to a doctor for reassessment. I hope this helps