Hermione later disguised herself as Bellatrix to get into her vault in Gringotts, which was guarded by a dragon; Bellatrix never knew of this. It is presumed that, in Harry Potter and the Deathly Hallows Part 2, Bellatrix was the one who killed Tonks as in the book, since Tonks's death is never shown on-screen.n Harry Potter and the Order of the Phoenix, Bellatrix was broken out of Azkaban by Voldemort and some of his Death Eaters, along with Antonin Dolohov and many other Death Eaters.
Additional Causes. Migraine attacks may cause vertigo that can last a few minutes or a few days. Stress, food allergies and hormonal changes can cause migraine-related vertigo. Less likely causes of vertigo may involve neurological problems, including brain hemorrhage, stroke or multiple sclerosis.
Balance and hearing disorders, head trauma, migraines, and cold viruses or ear infection are all common causes of vertigo. Other causes may include medications or blood pressure problems. What all these conditions have in common is that they affect the inner ear, which helps keep us balanced. When there is a dysfunction of the inner ear, this can affect the sense of balance, leading to symptoms of vertigo, dizziness, nausea, vomiting, and loss of balance.