I get a dizzy sensation when I lie down from a sitting position and the reverse, lying down to sitting up.  also get dizzy when I tilt my head backwards- as when I put eyedrops in my right eye.  What would cause this dizziness.  I was in Hawaii in May 2013 (extremely hot - no air contitioning) and the dizziness started then.  Can you explain what would cause this problem?
Hi, Thanks for using Chat Doctor. There may be multiple reasons for this like electrolyte imbalance, vascular problem in adjusting, cochlear problem or due to CNS. Get checked for BP, ECG once and get done serum electrolytes and ophthalmic examination (Retinoscopy) to diagnose the problem. For now have adequate regular sleep, plenty of fluids, nutritious diet with required calorie and regular outdoor exercises.  This will help you and Hope I answered your question. Consult your doctor for further management. Feel free to ask me if you have any further queries. Wish you good health. Take care. Regards