I am 19 and have these two creases/wrinkles under my eye lid. What are they and can they be treated? (Photo)

It looks as if you have a few things.  One is a tear trough, which is loss of volume under the lower eye and this can be fixed with some fillers.  The creases your seeing under your eyes are a combination of genetics, allergy (dennie morgan folds/lines) and due to aging/elasticity of the skin.  Botox, peels, laser, and/or microneedling all help with this.  As well as topical vitamin A and C products.  You should see a cosmetic dermatologist or plastic surgeon with experience in treating this.  I wish you the best, Dr. Emer.

You have several options that range anywhere from simple rest and nutrition to surgical blepharoplasty.  I would not consider surgery as a first option, as there are a lot of non-surgical options.  The fine lines and wrinkles can possibly be taken care of with a good medical grade skin care program with under eye repair serums, as well as good nutrition, staying well hydrated, and getting plenty of rest.  They could also be addressed using microneedling with radio frequency, PRP, stem cells, and/or hyaluronic acid, as well as other techniques. The light hollows in the tear trough can be softened with hyaluronic acid fillers which would help with the shadowing effect and smooth out the appearance of your under eye skin.  Laser treatments under the eye are an option as well, but would be further down my list of recommended interventions.
You said you are 19 and, assuming you have no other health concerns (allergies, collagen issues, etc), your skin is still "young" and "resilient."  I have seen good rest and good nutrition, coupled with a good medical grade skin care program and staying very well hydrated, do wonders for young, otherwise healthy skin, including under eye issues.  It takes a little longer to see results, but is certainly the safest and most conservative approach.  I would recommend finding an experienced and trusted physician to get a thorough skin evaluation so you can make the best decision.  Best of luck. -  Doc L

yes it must be corrrected in this  way because  some  not actualized dermatological or aesthetic people  utilize  frecquently  hialuronic. acid, or  collagen etc, the work quite welll and  are safe and practical  but  what they dont  telll you and hide than only lasts inside  less than 8 months, by oppoiste  plastma  and fat lasts  more than 5 years