Teenagers do not want to eat and have no appetite may be due to mental and psychological factors, colds, food does not meet the preferences and other reasons. 1. Psychological factors: stress, nervousness, sadness, anger, depression and other negative emotions may have an impact on the teenager’s appetite, resulting in not wanting to eat without appetite. 2. Colds: Colds are diseases caused by viruses invading the respiratory tract, which can lead to fever, cough, sore throat and other symptoms. Fever affects the activity of digestive enzymes, and the discomfort caused by cold symptoms can also affect appetite. 3. Food does not meet the preferences: different people have different food preferences, if you give teenagers do not like to eat food, will lead to do not want to eat no appetite, for example, part of the crowd smell ginger, cilantro flavor will be disgusted, see fried cicada pupae, locusts, etc. will be afraid. There may be other reasons why teenagers don’t want to eat and have no appetite, so you can go to the hospital for a checkup to clarify the situation.