Hi since I was young I have suffered migraine attacks, last year I had a cup of milk and had a massive migraine attack had to go to hospital and have a mri scan , since then I have had a good tolerance test with strands of my hair , and the results were I have very bad sensitivity to loads of foods ie dairy products, I have since had a lactose intolerant test done at a hospital and I am lactose intolerant and dairy intolerant, I have noticed since I had the massive migraine I have had buzzing in my head ever since , I have now pin pointed it to lactose and dairy products, so I stay off them as much as possible now and the buzzing subsides , 

if this helps anyone with the buzzing they are getting you might be dairy intolerant it's worth getting yourselves tested through a specialist at a hospital 

Thank you 

Maggie H