Hi there, I started getting pimples on my forehead earlier this year and could not work out why as my forehead had always been spot free! I read online that it could be diet related so although already healthy I made an effort to drink more water and take vitamin supplements. ... no difference! Then however, I read that dairy products can be a trigger for forehead acne, I am not diagnosed as dairy intolerant but decided to switch from cows milk to soya milk as an experiment. After a few weeks my forehead cleared! I decided to try and reintroduce cows milk but my forehead flared up again... I now only drink soya milk and no longer suffer from forehead acne. I can't say that you're the same as me but it may be worth considering. Dairy intolerance can strike at any age, Im 21 and prior to this year I had never had a problem with cows milk.