What's wrong with getting dizzy from heat?

A hot head may be dizzy due to vasodilation, but the brain blood supply is reduced caused, but it cannot be ruled out as hypotension, cerebral arteriosclerosis, etc. It is recommended to go to the hospital to do cerebrovascular examination, if it is caused by cerebral arteriosclerosis, it needs to be treated with drugs that soften blood vessels under the guidance of a doctor. Diet cannot eat foods with high fat content.