9-year-old dark-skinned boy in school uniform suffers from back and neck pain from carrying a heavy backpack has muscle strain

ache back pain school backache backpack boy brazilian brunette child childhood colombian discomfort disease education educational elementary ethnic exhausted expression gesture hispanic hurt immigration injury joyful kid latin america male medical medicine mexican muscle muscular neck painful peruvian position posture problem son south strain stress suffer symptom tired 9-year-old dark-skinned uniform suffers carrying heavy