Can asthma in a kid lead to sleep apnea?

Not really: Asthma, in children or adults, does not cause sleep apnea, but obstructive sleep apnea can trigger nocturnal asthma attacks. Therefore, any suspicion of osa in an asthmatic patient warrants a thorough work up.

Not usually: Sleep apnea is caused by multiple reasons. Asthma is not one of them.

Yes: Have them check for adenoid and tonsil and possible remove them.

No: Asthma per se does not cause sleep apnea. However obstruction in the upper airways including tonsillar/adenoid enlargement or significant nasal obstruction may.