Hello ma’am
Swimming pool conjunctivitis is very common , nothing to worry ,please keep the child away from the pool for a a week and than with proper precautions like using lubricants after a swim , bathing with clean water post the swim , properly fitted goggle ,
If it doesn’t come down please get consulted by an ophthalmologist
Next Steps
Meet a ophthalmologist if required
Health Tips
Use tear substitutes post swimming