Well, without a clinical evaluation it would be difficult to determine the cause of your symptoms or suggest possible management. Possibilities that may need to be considered include iliotibial band syndrome, osgood schlatter disease, chondromalacia, infections/ inflammations, bursitis, tendonitis, etc. I would suggest consulting an orthopedician or a sports medicine specialist for an evaluation at this time. After a cause is diagnosed, it can be managed accordingly.
Hope this helps.
As someone who has had 4 knee surgeries (3 ACL's and a meniscectomy) due to skateboarding and has bone spurs in both of my knees as well, go see a doctor now. All of my 20's have been spent injured so far. It has been 6 years since I got my bone spurs and 5 years since I tore my ACL and meniscus. By continuing t0 skate you are risking a greater injury in your knee.