What shall I do after Juvederm hit a blood vessel in my lip? (Photo)

It appears you have a simple bruise at the area of injection. There is not much that needs to be done at this point. The bruising with filler injections should not be expected or common. It all depends on the technique. There are several ways to prevent it. Any existing filler can be injected using a tiny needle, e.g.. gauge 32 rather than the needles provided with each product. The problem is that the original syringes of most of the fillers, by their physical properties, will not allow to extrude the filler when  a small needle is attached. That requires a transfer to another syringe but not everyone is willing to do it. Another ways to minimize the risk of bruising is to use a small cannula. Good luck!

Hello!
Bruise id very common with injectables. First contact your provider to let them know what is going on and thy will further instruct you. Arnica tablets taken as directed and pineapple juice are great for absorbing bruising. Do not take any NSAIDs aspirin or alcohol at this time. Give everything 1-2 weeks to settle in before doing any additional treatments. 
Best of Luck!
Glow Med Spa Encino