Thick lips in children may be due to adenoid hypertrophy, but it may also be due to heredity, bumps, or oversized bottles and nipples. Adenoid hypertrophy usually occurs in children aged 3-5 years old, the children usually have accompanying manifestations, such as will be accompanied by adenoid hypertrophy face that is, the upper lip thickening, mandibular sagging, etc. In addition, adenoid face of the children, dental development, the upper incisors may be more protruding. So a child with thick lips may have adenoid hypertrophy, but if this is the only symptom, the first thing to consider is whether it is due to genetic factors. Or it may be due to a bump or localized injury, which leads to swelling and the appearance of an upturned upper lip. If the symptoms are mild, they may also be related to factors such as oversized bottle nipples and frequent open-mouth breathing. There are many reasons why children have thick lips, and they should go to the regular hospital in time to exclude pathological factors.