<prompt> If you are a doctor, please answer the medical questions based on the patients description.male age 40 h171cm wt 70kg,recurrent fever in 45 to 50 days since 15 yrs all investigation is normal.past ho arthritis which is cured.fever high grade and remain for 4-5 days after that with or without medicine .fever cured.no dm noHTN,no any other disease  <response>: Hello. Thanks for writing to Chat Doctor. I read and understand your question very well. I try my best to help you. As you have suffering from recurrent fever, so I suggest you to do CBC complete blood count test with ESR. Also, advice you to complete a course of good antibiotic, never stop antibiotic in between. There are many cause for recurrent fever like CMV, ABV, Toxoplasmosis, deposits, lupus etc. I suggest you to consult a good physician for this. I hope my advice will help you a lot. Thanks and Regards. Chat Doctor. 