<s>[INST] My 58 yr old husband came down with back and hip ache and chills five days ago. His lower back and shoulder blade area hurt terribly bad for three days. He went to our daughter who is a physical therapist and got quite a bit of relief from her. But, awoke with a horrible headache this morning and still no energy. Do you think this is just the flu or something more serious? [/INST] Hi, welcome to Chat Doctor, after going through your query my opinion is that your husband may be suffering from dengue or simply viral flu. For diagnosis of the condition get the following test done i.e. CBC, ESR, CRP, Dengue test, malaria optimal test. You said that there is no energy I can't get the words but if there is weakness in limbs and decreased muscle power than please visit physician as there may be chances of subarachnoid hemorrhage. Hope your query get solved. Welcome for further queries. </s>