They are building up resistance to infections for life. Colds are caused by viruses. The symptoms are a clear to cloudy runny nose, a cough which is usually loose, a fever of 101 to 102 degrees, poor appetite, and tiredness. These usually last for 3 to 5 days and clear. They are not caused by teething.
Colds are very common at the time of teething and, therefore, most people associate the two.
The child should see a physician when the nasal drainage turns green, when there is associated ear pain, when a fever lasts more than 24 hours, when the cough becomes barking or harsh, when there is a crouping noise when they breathe in, or if the child acts quite sick. Otherwise, the child can be watched at home for a day or two. The treatment is symptomatic. Decongestants can be given orally. Nose drops should not be used unless instructed by a physician.