Doctor, from few days I got allergy of food contain onion garlic ginger. As maharashtra our food contain onion in every dishes. I have not problem with daal, chapati, milk, tomato, green vegetable. But when onion contained food come near me, I got some sulphur or aggressive rotten onion, garlic like smell. I am suffering this problem from last 2.5-3 week. Else I can eat every thing, in break fast I used to take 3-4 chapati with milk. In meal I took chapati daal and rice. Mostly my mom make bhaji without onion for me. I had this allergy from last 2-3 year, but severity was increase this time. I can't like to eat pulses due to it wired smell tend to me omitting. Whenever my mom gave me pulses bhaji in tiffen I ad skipped my tiffen or gave to other friend. I liked to eat chicken with it gravy. I did not get this problem in last week meal. I searched it on internet I found that head injury might be one of reason behind it. I have arachnoid cyst in right part of brain in mri and ct scan report. I consulted 4-5 neurologist for this headache problem till 2018. Every doctor has different opinion on mri, some doctor told surgery is necessary, first doctor gave me multiple injection in each visit, last doctor told that no need to take any medicine, he gave 2 month medication course, I completed that, told me that do mri every year to check size of arachnoid cyst. But due to dental braces I could do mri. I have sever headache problem, some time I can't control it. Once in 15 days I got sever headache which is not controllable for me, that day I take tablet given by doctor, and apply thick layer of pain relief gel on my head, sleep without any thinking. It would stopped after 2 hours sleep. That day I also suffered problem like nausea and not like to eat any medicine next day I feel comfortable. Currently I went outside 2-5 time for college, bank every where they tasted my body temperature and oxygen levels with oximeter, which come normal. Temperatures of body always nearly 96. I don't think any symptoms of cavity like no cough, fever. Though I suffering this problem from 3 week, no any family member got same problem like me. Kindly give your review on this topic.