My father has been suffering from an ailment whose no proper diagnosis has been formed till date. He is having symptoms such heaviness in head followed by severe vertigo and then followed by excessive vomiting. These symptoms are accompanied by weakness and tremors in body. He is having the aforementioned problems since Aug 2018. He has consulted from neurologist to gastroenterologist to ENT but to no good. No doctor has been able to find the root cause of his ailment. He had a CT scan of brain which showed a healed calcified granuloma in the occipital region but his neurologists say that it's not causing him problem and it has got nothing to do with his current problems. Then he consulted a gastroenterologist who did an endoscopy to rule out any GI ailment but to his surprise he found out nothing on an endoscopy. He also ordered an USG abdomen but there was no significant problem found on it. He also visited an ENT rule out Miniere's disease and glycerol test was -ve. What to do ?