Meniere's disease is an abnormality in inner ear fluid balance that causes episodic vertigo, tinnitus, and fluctuating sensorineural hearing loss. It is caused by malabsorption in the endolymphatic sac or blockage in the endolymphatic duct, resulting in endolymphatic hydrops. Management includes antihistamines, diuretics, antiemetics, a low sodium diet, and avoiding alcohol and smoking. Surgery such as endolymphatic sac decompression or vestibular nerve sectioning may be used in severe cases.