Migraine　is　a　leading　cause　of　disability,　yet　its　burden　in　children　aged　5　to　14　remains　underexplored.　Using　Global　Burden　of　Disease　(GBD)　2021　data,　we　analyzed　global,　regional,　and　national　migraine　burdens　from　1990　to　2021.　Age-standardized　incidence　(ASIR),　age-standardized　prevalence　(ASPR),　and　disability-adjusted　life　years　(DALY)　were　assessed,　with　estimated　annual　percent　change　(EAPC)　used　for　trend　evaluation.　A　Bayesian　Age-Period-Cohort　(BAPC)　model　projected　incidence　to　2050.　Globally,　migraine　cases　rose　by　39.5%　(21.95　to　26.87　million),　though　ASIR,　ASPR,　and　DALY　rates　remained　stable.　Low-middle　Sociodemographic　Index　(SDI)　regions　had　the　highest　prevalence　(31.19　million)　and　DALY　(1.11　million),　while　high　SDI　regions　recorded　the　highest　female　incidence　rates.　Western　Sub-Saharan　Africa　showed　the　largest　increases　across　all　metrics　(EAPCs　＞　3.0).　Brazil　reported　high　ASIR　and　DALY,　while　Thailand　had　the　greatest　DALY　reduction,　likely　due　to　effective　public　health　measures.　Projections　suggest　declining　ASIR,　ASPR,　and　DALY　rates　by　2050.　These　findings　indicated　absolute　cases　of　migraine　have　increased　due　to　population　growth,　the　age-standardized　burden　has　remained　stable　over　time.　Strengthened　surveillance,　targeted　screening　in　low-middle　SDI　regions,　and　school-based　awareness　programs　in　high-burden　countries　are　essential　to　mitigating　migraine-related　disability　in　this　vulnerable　population.