What alternative therapies are used to treat migraine?

Migraines present in various ways so the best treatment changes on an individual basis. Aside from standard medications (of which there are many to try) alternative therapies include: drinking more h2o, walking, fresh air, laying in a dark room with an ice pack to the head, homeopathy, acupuncture, or cranial osteopathy. De-stressing & avoiding your triggers are the most important thing to do.

Several modalities: I would say that it depends on the cause - whether it is food allergy/reaction based, stress based or neurovascular or even musculoskeletal. Several things can be tried - including but not limited to: changing diet, osteopathic cervical and craniosacral treatment, meditation, rehydration, cold packs on neck/ head, napping in a dark quiet room, massage and most importantly avoid caffeine!