Hmm, macam ada few possibilities ni, bisa je ada virus atau flu ringan yang bikin perut dia jadi tak selera, or maybe dia tengah teething dan gusi dia sakit so makan jadi uncomfortable. Mana yang mula-mula, the loss of appetite atau the nausea? Either way since ada mual-mual tu, best check with your pediatrician just to be sure lah, especially if it lasts more than a few days or dia jadi lethargic, mums in my group pun biasa je call clinic kalau ada perubahan sudden gini, better safe than sorry kan!