Why does my lip balm give me pimples on the edges of my lips?

It sounds like maybe your lip balm clogs your pores.

Make sure your lip balm doesn’t contain any petroleum-derived ingredients (mineral oil, petroleum jelly, etc.) or synthetic preservatives. Try an all-natural lip balm and observe the results. It would be also a good idea to choose a lip balm in a stick or tube (one that doesn’t require you to dip a finger in it) to minimize the likelihood of introducing bacteria from your finger into the balm and then onto your lips.

You could go a step further and use a lip balm with an antibacterial ingredient in it, such as honey, eucalyptus, cloves, lavender, cinnamon, lemon, melissa, tea tree, or propolis. Many of these ingredients—such as cloves or honey, make for very delicious lip balms.