Yes, I found that out too....
I take medication for high BP, so when my head started to bang at times when I first started the SW diet, I took no notice of it....
But, now I have noticed that a 'suger rush' does cause it, I had quite a lot of dolly mixtures last night, I had the syns to cover them so I just kept nibbling on.
And I have had a 'muzzy' head all day today, I usually keep away from sweet's and sugary things, but I just couldn't resist these dolly mixtures (2nd childhood) so it is my own fault. X