It is common to find nasal discharge after a roseola
infection for that matter any viral infection. She should get better soon.
Make sure she is protected from cold
, smoke, dust. Remove the mucus with nostril
sucker. It gives way for easy breathing. Monitor her temperature and feeding. If you are suspicious about anything please reach a ER for prescription of ample anticold and antibiotics.
Mucus has a lot of lysozyme
which has killing properties so the immune system is acting well to defend her. Do not worry