First of all, it is necessary to find out whether you are eating or playing, or whether you like eating foreign things. If you just eat and play (children often like to put their hands in their mouths), then there is no problem; If you like to eat foreign bodies, it may be zinc deficiency. It is recommended to go to the hospital to check trace elements. If it is zinc deficiency, please supplement zinc under the guidance of a doctor. In fact, you can also eat complementary food at home first. Egg yolk, fish, meat and seafood all contain zinc. I don't know when your child began to add complementary foods (such as pureed vegetables, egg yolks, and pureed fruits). -it should start at the age of four months). If it is not replenished in time, it is also a cause of zinc deficiency.