What will you do when you have a problem with your boss?

It depends on the problem, but if it is just a minor personality conflict, a lot of things can be fixed with just a calm talk. Go to them and mention you notice there has been some tension (or whatever the problem is), and ask what YOU can do to fix it.

Bosses are people like everyone else. They may not even realize there is a problem. They might be thinking about the argument they had with their teenager the night before and it has nothing to do with you at all.

If it turns out it is something you are doing, try very hard not to get defensive. Let them know you want to fix things, and ask for advice.

If it is something they are doing, try to let them know in the softest and most constructive way possible. Make every attempt to not sound accusatory or angry. Don't use Words like "you always" or "every time." Be sure to add something positive in there so it is not like a personal attack.

If it is a more serious problem, or you just don't feel you can communicate with this person, you can always try human resources (HR). If you go to HR and make it very clear that you are not filing a complaint, but you need some advice on how to deal with a situation, they will often help you out with tips on how to get through it or who to talk to.