My 1 yr old has swollen bumps all own her leg, on her foot, and one on her hand. Wasnt swollen yesterday. What is this?

Are they hives? Without looking at the bumps, it would be impossible to make a diagnosis. So these are my guesses. (1) hives due to some allergy, (2) insect bites such as mosquito bites, (3) scabies, (4) a virus infection, (5) hsp (though she is a bit too young), (6) itp (immune thrombocytopenic purpura). These are some potential diagnoses. If the bumps bother her, please take her to a doctor. You could send pics.