What is okay to ask of from my child's teacher regarding his physical health?

It's often not OK to ask the school to give medicine or other medical care (or it may be OK but only if you give the the medicine and a doctor's prescription for it).

It is OK (I expect it's required) to inform the school of any particular health risks (including allergies).

It is OK to ask the school to keep an eye on children's health, i.e. on whether they're well enough to be at school.

It is OK to expect the school to provide first aid in an obvious emergency ... beware that the "first aid" they can provide may be minimal, may involve just phoning an ambulance.

It is not OK to expect the school to nurse a child who's too sick for school ... they're likely to prefer the child to be at home: if they're infectious; if they can't keep up; or if they even distract the teacher too much from the rest of their class.

Given that the teacher cares about the child's well-being and acts in loco parentis to some extent, I'm pretty sure the teacher would want to know, would rather you told them than didn't.

What is okay to ask of from my child's teacher regarding his physical health?

It's often not OK to ask the school to give medicine or other medical care (or it may be OK but only if you give them the medicine and a doctor's prescription for it).

It is OK (I expect it's required) to inform the school of any particular health risks (including allergies).

It is OK to ask the school to keep an eye on children's health, i.e. on whether they're well enough to be at school.

It is OK to expect the school to provide first aid in an obvious emergency ... beware that the "first aid" they can provide may be minimal, may involve just phoning an ambulance.

It is not OK to expect the school to nurse a child who's too sick for school ... they're likely to prefer the child to be at home: if they're infectious; if they can't keep up; or if they even distract the teacher too much from the rest of their class.

Given that the teacher cares about the child's well-being and acts in loco parentis to some extent, I'm pretty sure the teacher would want to know, would rather you told them than didn't.