As a fellow sufferer, my perception is once you've had it you're prone to it. As with advice from others, all eye makeup must be binned after a break-out. Also in future watch the amount of time you use a mascara or eye pencil - they are havens for bacteria. I'm sure you've done it, but daily changing of towels and very hot wash for towels - facecloths too if you use them but I believe facecloths are the work of the devil and all should be burned, burned I tell you. General eyestrain, run-downedness etc also seem to provoke an outbreak for me.