Hello everyone ? Dear moms, our eldest son stopped eating, he has no a…

Hello everyone ? Dear moms, our eldest son stopped eating, he has no appetite at all, teeth don't come out, he's active during the day, we go for walks in fresh air, daytime and nighttime sleep is normal. Everything I offer he doesn't eat, he only drinks fruit juice and sometimes may drink an ice cream. He stopped eating fruits. He doesn't refuse sweets naturally, but I don't give him anything, I wait when he will eat normal food. For three weeks now there have been strange tantrums, he might hit, bite, pull his hair. In general, I don't know what's going on, maybe growth spurts or something like