First of all for prevention of herpes, stay away from peanuts, wheat, and chocolate. You can eat some, but not too often. Also, Lysine is very good for prevention. Eating alkaline foods(meaning it leaves a non-acidic ash after digested) also helps. Foods such as all greens, tomatoes, fruits, white potatoe, red potatoes. almonds, banannas, beets, carrots, celery, molasses, onions, rutabagas, watermelon, radishes. Acidic foods (meaning these foods leave an acid ash after digestion) such as anything white, except for potatoes, meats, milk, cheese, coffee, crackers, eggs, fish, imacaroni, peanut butter, dried peas, sugar, salmon, sardines, shrimp, spaghetti, soft drinks walnuts, and tea.
Estrogen is also a cause, anytime you have fever, you may be likely to have outbreak. That time of the month for women is also a cause. Belive me, eating habits will almost reduce the outbreaks, but no doctor will tell you this because I don't think they know it. They like to sell medicine.