Does It Mean Your Lipstick Has Gone Bad?
"Seeing sweating on your lipstick means that the composition of the lipstick has slightly changed," Ko said. "That may affect the performance of the lipstick." Fortunately, sweating doesn't make the product dangerous to use. If you'd still like to use the product, you can wipe away the oil with a tissue and (just to be safe) disinfect it with some rubbing alcohol.