My 2 year old daughter has a little hair under her arm and gets body odor when she is sweaty is this a problem? Is there a deodorant she can use?

Have her seen by ped. Children should not have body odor or arm pit hair before puberty. This may be a congenital hormonal disease. There have been cases where breastfed children of mothers taking hormones may be absorbing these. Also, if any parent is using topically applied hormones, take care not to let child come in contact with area of application. Have child seen by a pediatrician or pediatric endocrinologist. .