My hairline is uneven, what should I do?

Uneven hairlines in men usually indicate that recession from genetic balding has started. Showing up on only one side is not uncommon but eventually it will impact the other side and more recession of the entire hairline is very probable. See a doctor who can make the correct diagnosis. If you are over 25, you can transplant it to correct the uneven appearance but you should also take the drug finasteride to stop the progression of the balding process.