### Human:\nwhat would cause nightly chills and fever and then during the day the symptoms go away and return at night?\n\n### Assistant: if you've been out of the country recently you may need to have a tuberculin skin test. tuberculosis can cause night sweats chills cough fatigue fever as well as other things or can be asymptomatic. the skin test isn't painful just a bit uncomfortable because they create a tiny blister under your skin and check it 48 hours later for a reaction. you might be taking medication that causes these side effects. best advice is to just go see your doctor to make sure you don't have any infections.