Best way to treat red marks from laser resurfacing under eyes. Is a line under eye like half an eye bag normal?

Hello Poetsjasmine!
I know this can be a scary time, so I can appreciate your questions. Dark pink/red is a great result... as we often tell patients "No Red- No Results." The redness turns to dark pink then lighter shades of pink typically over several weeks depending on the intensity of the treatment and your skin type. As tempting as it is to use a lightening cream, I would not until your surgeon gives you the ok. It is too soon to judge your surgical outcome(even with the line). I usually tell patients not to take family photos over the first 6 weeks after surgery, but that I will not make any final judgements for 3-6 months after surgery. 
Finally I would recommend that you contact your surgeon, because he/she knows your situation since they were involved in your surgery and will be best to be able to advise you. I am sure they would want to hear from you as I would for my own patients. 
All the best!
Dr. Tamboli

It is way too early to judge the results of your surgery.   What you are experiencing is all part of the normal healing process.  It takes 3-6 months to get an idea of what your final results will look like, and you may see some additional improvement for up to a year.   In any bilateral surgery, both sides will heal at different rates.  I always describe them as cousins, not twins.  Make sure to continue to follow up regularly with your surgeon . Be patient, and I bet you will be very happy.  Good luck!