Hello dear, The crystals in the inner ear (known as otoliths) play an important part in maintenance of body posture & balance. The symptoms as mentioned in your post can be attributed to pathology in the inner ear most probably Labyrinthitis or Benign Paroxysmal Positional Vertigo. A proper clinical examination by an ENT Specialist & Vestibular Function Tests will be helpful in clinching the diagnosis. Though symptomatic relief can be obtained with intake of Vestibular sedatives like Betahistine or Cinnarizine preparations (to be taken only under the guidance of a Physician), the underlying cause needs to be treated. There is no need to worry, your husband will be fine. Till then, he should maintain adequate hydration & proper nutrition status and avoid stress. And also take precautions of getting up from bed slowly & avoid sudden head movements. Wishing him a Good Health. Take care.