1. Symptoms of Goat Milk Powder Allergy Goat milk powder allergy refers to the human body’s allergic reaction to certain proteins in goat milk, causing a series of uncomfortable symptoms. Common symptoms include skin allergies, respiratory reactions, and gastrointestinal reactions. Skin allergies manifest as skin redness, itching, eczema, etc.; respiratory reactions manifest as asthma, throat tightening, etc.; gastrointestinal reactions manifest as diarrhea, bloating, nausea, etc. When these symptoms occur, you need to seek medical attention promptly and stop consuming goat milk products. 2. Causes of goat milk powder allergy. The main reason for goat milk powder allergy is that the human body is allergic to goat milk.