DON'T scratch or pick at a cold sore whatever stage it's in. This could lead to an infection that will require antibiotics, and -- in worst case scenarios -- scarring.

DON'T check it compulsively in the mirror. Checking to see if your cold sore is going away won't make it disappear any faster. Remember -- an untreated cold sore can last a week to 10 days, while the median healing time for Abreva is approximately 4.1 days. (15% faster median healing time vs. topical cream placebo)

DON'T believe everything you read on the Internet. Cold sore remedies abound, along with misinformation, and not all healing claims are supported. Remember -- Abreva is the ONLY over-the-counter medicine approved by the FDA to shorten healing time and duration of symptoms.

DON'T kiss when you're contagious. Although cold sores are infectious throughout the entire outbreak, they are especially so during the blister stage. Be especially careful not to touch a weeping blister as this could increase the risk of spreading the infection to others.

DON'T borrow someone else's lipstick. Because the HSV-1 virus is so easily transferred, don't borrow someone else's lipstick -- or lend your lipstick to someone else.

DON'T apply more Abreva than needed. Using more than the recommended daily amount won't make your cold sore go away faster. Follow the instructions for use.

DO learn to recognize the signs of a cold sore. When you feel that tingling, itching, or burning in your lips, a cold sore is likely coming on.

DO learn to know your individual triggers. For example, if cold sores tend to crop up when you get stressed out or run down, try to relax during stressful periods.

DO use sunblock. Since exposure to sunlight is one of the most preventable of triggers, be sure you use a good sunblock, not just a sunscreen. Look for zinc oxide or titanium dioxide in the ingredients.

DO keep Abreva on hand. For best results ABREVA should be used at the first sign of a cold sore; so keep a pump or tube handy in your medicine cabinet, your purse or at your workplace.

DO talk to your Pharmacist about any concerns about your cold sore. Remember: He or she is there to help you, and offer reliable, relevant advice.

DO see your doctor if the blisters last more than 10 days.

*ABREVA Risk-Free Guarantee: If you aren't completely satisfied for any reason, save your receipt and remaining product, and call 1-877-709-3539 to get your money back.