As a mom, with severe persistent asthma, and a mom of a child with asthma- I would call.

Medically speaking, kids airways are so much smaller than an adults so it takes less inflammation to have a problem.

Additionally, kids can compensate (their bodies work extra hard to stay stable) and then crash so so fast.

The kid needs an asthma action plan with peak flow guidelines and the mom could use some solid comprehensive asthma education.

If he needs it, a nebulizer is a great thing- it can save ER visits and hospitalizations really frequently. If he is the type of kid to get bad fast an epi pen is also a good thing to have.