My left leg hurts in the morning when I get up. It is most noticeable if I hav take alcohol previous night. 50, 185cm, 85kg. Should I worry?

Depends. Usually this relates to a chemical imbalance after moderate amounts of alcohol are consumed. Joints are commonly incolved in this process, and most often noticed in the lower extremity. If no injury occurred and anti-inflammatory meds (motrin, aleve) help, then it seems likely this is the problem. If it persists, its worth getting looked at to ensure it isn't a more serious problem (gout, djd, etc).