I have recurring styes. When I treat it, it disappears, then another one appears. What should I do?

It is indeed uncommon for a stye to be recurrent.

First, I would suggest daily eyelid hygiene. Make sure you remove your makeup with a gentle product. Most drugstores have "Cilnet", an eyelid cleanser, on the shelf. You could use this type of product.

Also, make sure you have replaced any cosmetics that may have come in contact with your eyes during your previous infection. These products may be contaminated and responsible for your reinfections.

Karina