Left half head ache is what circumstance be

Pain in the left side of the head may be caused by migraine, functional headache, brain tumor, etc. If the nature of the left side headache is a pulsation-like headache and it manifests intermittently, it may be caused by migraine, mainly due to lack of sleep, It is caused by factors such as prolonged drinking, overwork, etc. If the symptoms of headache persist and occur repeatedly, without other uncomfortable manifestations, it may be a functional headache. If the headache on the left half continues to worsen, and also shows dizziness, nausea, vomiting and other manifestations, it may be caused by intracranial tumor. After intracranial tumor, it will compress the surrounding soft tissue, causing poor circulation of cerebrospinal fluid, which will cause persistent headache. It is necessary to go to hospital for brain CT, MRI and other examinations to confirm the diagnosis in time.