A burr in (one's) saddle phrase
A person or thing that repeatedly irritates someone or something or causes trouble for them.
I thought John would be helpful when letting him join our team, but he has turned into a burr in our saddle.
Many see this tax as a burr in the citizens' saddle; however, in the view of the government, it is the only way to keep the economy afloat.
The origin of this phrase is not clear.
people often do irrational or foolish things when they are in love.
I and my boyfriend have decided to get married in the summer. I don't think that's wise, since we won't have enough money saved by then to set up house. But then, one cannot love and be wise.