Chills, regurgitation and fever may be caused by upper respiratory tract infection, acute gastroenteritis, urinary tract infection and so on, you can first carry out routine blood tests, and according to the cause of the disease to choose the treatment such as the use of antibiotics, antiviral drugs and so on. 1. Upper respiratory tract infection: Upper respiratory tract infection may lead to chills, regurgitation, fever, generally should not use antibiotics, you can rest, pay attention to air circulation, if necessary, you can use antipyretic and analgesic drugs, such as ibuprofen, aspirin and so on. 2. Acute gastroenteritis: you can first carry out routine blood tests, routine stool tests, in the diagnosis of bacterial infection can use antibiotics such as amoxicillin, cephalosporin, roxithromycin and other drugs for treatment; if it is a viral infection, you can use antiviral drugs such as oseltamivir and so on. If severe regurgitation occurs, you can use gastric mucosal protective agent omeprazole and other drugs if necessary. 3. Urinary tract infection: apply antibiotics, such as levofloxacin anti-inflammatory treatment, at the same time drink more water, flush the urethra, pay attention to rest. There are chills, regurgitation and fever, there may be other reasons, such as cholecystitis, pancreatitis, food poisoning, etc., you should consult a doctor in a timely manner, and the relevant drugs should be used under the guidance of the doctor.