What is the evidence for using Botox for chronic migraine, then?

那么，有何证据证明使用肉毒杆菌素可治疗慢性偏头痛？

youdao

Chronic migraine differs from ordinary migraines and tension headaches, however.

然而，慢性偏头痛与普通型偏头痛及紧张性头痛不一样。

youdao

In chronic migraine, the person has a headache on more than 15 days of each month, at least eight of which are migraines.

慢性偏头痛患者每月中有半个多月都会头痛，其中至少有八天是偏头痛。

youdao

The symptoms of ME include chronic fatigue, muscle pains and migraine, but in extreme cases patients can develop a permanent physical disability.

BBC: Doctor and child

Its fans will tell you that it relieves a variety of ills--from asthma, hay fever and sinus infections to chronic pain, arthritis, inflammation and migraine.

FORBES: Magazine Article