Stretch marks occur when the tissue under your skin tears from rapid growth or stretching. Stretch marks often show up on places like your breasts, thighs, hips, and butt. Most girls and women have stretch marks, so if you have them, you're not alone. Although they're more common in girls, guys can get stretch marks, too. Guys and girls who are body builders are more prone to getting them because of the rapid body changes that body building can produce.
Obesity can also lead to stretch marks.
So if you're taking a trip to the beach this summer, you shouldn't stress out too much about them. Your stretch marks will usually fade and become less noticeable over time. Although there are tons of products on the market that claim to eliminate stretch marks, the truth is you can't make them go away without the use of a form of plastic surgery called microdermabrasion. If you are concerned about your stretch marks, talk to a dermatologist. For specific medical advice, diagnoses, and treatment, consult your doctor.