It’s the number one cancer diagnosed in women aged 25 to 29, and incidence has increased 50 percent among all women under 40. When it’s found in a late stage, melanoma has only a 16 percent survival rate—but if it’s caught early, the survival rate jumps to 98 percent. Do a self-exam for new or suspicious moles every month (don’t forget to check hidden spots, like your belly button and the bottoms of your feet!), see a dermatologist for an annual spot check, and for heaven’s sake, apply sunscreen every single day.

MORE: Important Melanoma Prevention Tips You Need to Know