Brusing from Phosphatidylcholine

A year ago I bought a Mesotherapy kit and had great results with it. Then, I decided to buy phosphatidylcholine from another seller and used it, but it gave me these big bruises that I still have after 3 months. How can I help my skin repair itself from this? Why did this happen? Is it contraindicated to use phosphatidylcholine alone or should I have used it in a kit, like the first time? Thanks.