Pimple on forhead. Basic protein source.

I am a working professional and recently I have noticed too much acne or pimple formation on my forehead and sides to my forehead. Since I am into fitness also I workout every morning hence I eat 12-15 eggwhites every day.. Is it because of eggs..?? I keep long hair also which drops to my forehead and they stay there only u have tried keeping them back but eventually they drop down.. Some one told me the heat of your hair also can cause such ances to your forehead. Also I regularly use helmet so again my forehead and sides are exposed to the texture of helmet.. Also I sweat a lot.. A lot. What should I do? Because I.. can't stop eating eggs as that's my basic protein source.. I have tried my keeping my hair short also but didn't help. Suggest something.. Responses will be appreciated..