The 7-year-old girl always has stomach pains which may be related to improper diet, gastrointestinal diseases, enlarged mesenteric lymph nodes and so on. 1. Improper diet: If girls do not pay attention to their dietary habits, such as favoring spicy and stimulating foods, raw and cold foods, and overeating at the same time, it may lead to the occurrence of stomach pain. 2. Gastrointestinal diseases: girls’ stomach pain may be related to gastrointestinal diseases such as intestinal cramps, intestinal obstruction, etc., accompanied by vomiting and other conditions. 3. Enlarged mesenteric lymph nodes: If a girl has a fever, cold or respiratory tract infection when she has a tummy ache, it may lead to enlarged mesenteric lymph nodes in the abdomen, and the above conditions may also occur. There may be other reasons for the 7-year-old girl’s stomach pain, and it is recommended to go to the hospital in time for the relevant examination, and then actively treat the symptoms after clarifying the cause of the disease.