<s>[INST] I am 63 years old and last night I had a high fever but no way to take but I had hard chills that lasted a good 20 mins.. Tonight my temp spiked to 105 with hard chills. I have no other symptoms but the chills left me exhausted. Should I go to the ER OR WHAT. [/INST] Hellish type of high grade fever may be due to these possibilities, these include:1 Malaria, diagnosis can be confirmed by blood film for malarial parasite.2 Viral fever, usually associated with cough and cold with sore throat.3 Urinary tract infection. Diagnosis can be confirmed urine culture test. At present no need to any ER but take Tylenol and cold sponging. If no relief then consult a physician in routine. Hope this will be useful for you. </s>