Why do I keep getting cold sores?!?

so I just had a cold sore and its healed but NOW I just got another one! I'm so mad and I use the medicine Abreva ( it really helps too ) but school is startnig soon and I hate going to school with a cold sore because I feel embaressed and grossed, anyways, why do I keep getting cold sores? How do I make this... show more so I just had a cold sore and its healed but NOW I just got another one! I'm so mad and I use the medicine Abreva ( it really helps too ) but school is startnig soon and I hate going to school with a cold sore because I feel embaressed and grossed, anyways, why do I keep getting cold sores? How do I make this cold sore go away faster? please help! :(
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