The strawberry mark is what you suck out of your lips, when you suck hard, your lips will be a little swollen, this is normal, don't worry. You can suck lightly on the inside of your lower lip so that the strawberry mark is not obvious. You can also use your finger to press lightly, so it is not obvious. If you want the strawberry marks to be more obvious, then you have to suck more times so that the strawberry marks are obvious. You can try it, it works. That's what I did, it works well, you can try.