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(CBS News) A 6-year-old boy is breathing easier after doctors found the cause of his sinus problems.

The culprit? It's quite possibly a Lego piece that he shoved up there, probably when he was three years old, his father claims.

"I felt so bad," said Craig Lasson, Issak's father, said. "He was sleeping with his mouth open, trying to breathe."

The Salt Lake City boy has had sinus problems since the age of three and has been on multiple courses of antibiotics. Finally, a doctor who gave the boy a checkup said he thought he saw a foreign body in his nose. When asked about it, Issak said he thought he put a piece of spaghetti up there, but that was long ago.

A specialist removed the offending object, which turned out to be a flexible Lego tire covered in fungus.

"I asked him, 'Dude, how did that even get in there?'" Craig said to KSL. "We think he bent it in half - it's pretty flexible - and that it opened up once it got into his sinuses."

Since the appointment, Issak's appetite has improved, he has more energy and he sleeps better than before, according to Craig. He doesn't remember putting the Lego there.

"It's just one of those weird things," Craig explained to KSL. "Isaak thinks it's pretty cool. He said, 'I didn't even know ... this is weird.'"

Lucile Packard Children's Hospital at Stanford said that any foreign bodies placed in the ear, nose or mouth that is not intended to be there can cause harm and needs immediate medical attention. Children often put soft toys in their nostrils, according to the hospital, and parents should look out for nasal drainage with a bad odor or a bloody nose on the side that has the blockage. Normally a physician can remove the object either through a suction machine or with an instrument.