Babies grow teeth from above, as long as there is no abnormal reaction, generally normal, whether the lower teeth or upper teeth first, generally no good or bad.
According to the current point of view, most babies are first grow lower teeth and then grow upper teeth, but does not rule out that some babies may grow upper teeth first and then grow lower teeth, as long as the body has no other adverse reactions, no gums redness, swelling, pain and other conditions, basically belong to the normal situation, without special treatment.
Children at about two and a half years old, there are about 20 teeth can fully erupt oral basically normal, so whether the first growth of upper teeth or lower teeth, there is not too much impact, there is no good or bad.
Children need to be regularly observed during teething, once the teeth are found to be crooked, they should consult a doctor in time and be treated under the guidance of a professional physician. If the root of the tooth is itchy, drooling and so on, it is a normal performance and does not require special treatment.