I give my baby gerber foods shes 4months old.... she has little red bumps on her chin?

ok my baby has little red bumps on her chin people told me on here that it was baby acne but i was thinking do u think that its from the gerber foods or what.... cuz i kow people who gave their little ones solid foods and nuttin happend to them... u know doctors are going to say that babies are all the same and their not all... but i was wondering duz ne1 give their kids solid foods...