I don't believe in unnecessary medical treatment. do i really need to treat basilar artery migraine?

Depends on how bad i: The answer depends on how bad they are. If you can tolerate them without any issue then the answer is no. If they bother you then avoid triggers, exercise regularly, limit stress and get enough sleep (eg 7-8hrs min). Eat a well balanced diet, avoid medications and alcohol and smoking. Avoid dairy, caffeine wheat, chocolate, eggs, rye, tomatoes, oranges.There are some medications - talk to your md.

Depends on severity: This depends on the frequency and severity of your headaches. If your headaches are mild, with no vision loss and infrequent and do not interfere with you lifestyle.Then no. However if your headaches are frequent, severe, associated with vision loss and interfere with your lifestyle..Yes. Imagine driving and getting a headache, suddenly you can't see, your leg ataxic, speech slurred very dangerous.