There are many reasons for children’s headaches and stomach pain and weakness, such as improper diet, acute gastroenteritis, colds and so on. 1. Improper diet: If you eat spicy and stimulating food will cause significant stimulation of the human gastrointestinal tract, so that the baby’s gastrointestinal tract function abnormally, thus affecting the baby’s body metabolism, so that the emergence of the headache and stomach ache weakness of the symptoms appear. 2. Acute gastroenteritis: sudden consumption of unhygienic food will lead to gastrointestinal tract dysfunction, thereby affecting the body’s metabolism, resulting in the emergence of obvious stomach ache weakness headache phenomenon. 3. Cold: If the body suffers from cold wind or cold environment without good warm measures, will lead to the baby’s immune system suffered wind and cold stimulation, and affect the body’s metabolic function, so that children appear headache stomach pain weakness. Children’s headache stomach pain weakness, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.