<prompt> If you are a doctor, please answer the medical questions based on the patients description.Today, had sudden onset VERTIGO, THEN COLD SWEATS NAUSEA. No chest pain, headache, or anything else. then felt very tired and slept for two hours, noon to 2 PM, even though had a good sleep last night. Now feel 90 better.I am 73 y.o. and in excellent health otherwise, very physically active, no meds, habits, or health history except Kidney stone appendectomy; BMI about 25. M. died age 97, F. died age 102.Dx: Labyrinthitis?  <response>: Hello! Welcome on Chat Doctor ! Your symptoms seem to be caused by an inner ear disorder. If this episode repeats, I would recommend consulting with an ENT specialist and performing labyrinthine tests. It is also important performing a Doppler ultrasound of the cervical arteries carotid arteries and vertebral arteries to check for possible narrowing. Hope you will find this answer helpful! Kind regards, 