My left eyebrow is higher than my right, what should I do? (Photo)

Brow asymmetry can be a complex and tricky subject. It can be related to history of facial nerve or eyelid weakness on one side, or differences in bony anatomy/size of the forehead between the two sides. Subtle lifting of the lateral aspect of brow with Botox can be helpful in treating small brow asymmetries. However, chasing brow asymmetry in general can be very difficult specially when a clear cause is not found and in those cases it can be related to dynamic differences of habitual use of facial muscles throughout the years. Such asymmetries which are usually subtle are a part of the character and animation of the face and also not very uncommon.

Thank you for your question. At your age, botox may be a great solution because it is temporary and can provide you results quickly. A brow lift is a permanent procedure. To determine your candidacy for both, I suggest that you move forward and consult with your board certified facial plastic surgeon.
Best wishes,

Given your youth, you may want to try Botox first to give your eyebrows a little more even appearance. If you like the look, I'd recommend proceeding with an eyebrow lift, which will last longer and ultimately cost less, as Botox must be reinjected every three to four months to maintain results.
If surgery is an option for you, at my center, we can perform a brow pexy or 1-mm brow lift under local anesthesia to give you a naturally alert and refreshed look.  The procedure can be performed bilaterally or unilaterally which seems to be what you’re looking for.  Local anesthesia means that you can be awake and help direct your final outcome by giving feedback on the look we are going for.  
Your first step is to find a board-certified facial plastic surgeon who can evaluate your brow droop and recommend the best corrective measure.
I hope this helps!