Can coolsculpting cause stretchmarks? Abdomen coolsculpted yesterday. (photo)

Thank you for your question and I am sorry to hear that you are worried.
Cool sculpting does not cause stretch marks. I am not sure based on the photos you sent about the marking, if you had a proper treatment with a Zeltiq machine, you should not have any permanent marks on your body, you might experience some red marks, similar to a love bite or limited bruising. They tend to disappear very quickly, in days after treatment. However, two applications in the sam session is not common practice or recommended, I am not sure what treatment protocol you had.
I would suggest to double check with your provider as to what treatment and what consequences.
Good luck and all the best!

Don't worry! A little redness after CoolSculpting is perfectly normal and will not last. Because CoolSculpting reduces the volume of fat underneath the skin rather than adding to it, your skin is not stretched. 
 
CoolSculpting uses a patented technique called cryolipolysis to lower the temperature of a treated area enough to send fat cells into apoptosis (slow cell death), but not enough to have any permanent effects on skin, muscle, organs, or any other tissues. Some patients do find that they are tender, swollen and pink or red for a few days after CoolSculpting. If the redness lasts more than a couple of weeks, then please consult your board-certified dermatologist.

Thank you for your question. Coolsculpting does not cause stretch marks. What you may be experiencing is redness or bruising in the treatment area which are common side effects of the treatment. This may last up to two weeks. Please consult with your provider if you are concerned. Regards,