1. Reasons why newborns get angry after eating milk powder. There are many reasons why newborns get angry after eating milk powder, which mainly include the ingredients of milk powder, feeding methods, seasons and other factors. First of all, there are many types of milk powder on the market with different ingredients. Some milk powder has some nutrients added, such as calcium, iron, etc., but excessive intake of these nutrients can cause babies to get angry. Secondly, feeding method is also important. If the baby eats too full or too quickly, it will cause indigestion and lead to internal heat. Finally, the season is also an important factor affecting babies’ anger. Summer temperatures are high and humidity is high,