How to tell the difference between normal irritation and illness when it comes to teething?

For normal teething, symptoms would be mild -- this includes rashes, drooling, runny noses, short-lived diarrhoea, crankiness, loss of appetite and slight fevers. These ailments are never severe and usually do not last beyond a day after the tooth has sprouted. Babies with illnesses will likely experience the same symptoms but more persistence i.e. high fevers and non-stop crying.