Head lice Head lice are very contagious parasitic insects, passed through direct contact. Itching is the most common symptom. You may see nits, or eggs, in the hair. He may return to school the next day. Bronchiolitis Look for a runny nose and bad cough.
Many children have a low-grade fever one to seven days before the cough starts.
It's a deepening cough, accompanied by faster breathing and restlessness. The cough triggers vomiting, and because of the respiratory distress and lethargy, the child doesn't want to eat. It's usually contagious three to eight days, but in some cases, up to three weeks. If you think your child may have a respiratory infection, talk to her pediatrician. Colds are believed to be most contagious during the first three days after symptoms appear.