Our patient came in with a story we hear way too often: She had hives and mild lip swelling after drinking a protein shake twice. She didn't realize it had soy. Glutathione Injections: Side Effects & Benefits Allergies can certainly cause hives. However, not only allergies, but also various autoimmune conditions, can cause hives. Thus, it's very important to consult your doctor for a proper diagnosis. . . . [ Ever had red, itchy welts suddenly show up on your skin? That could be hives. Dr. Sheila Bonilla explains whats happening on your skin and the treatments that can help bring relief., #Allergies Is glutathione safe? Side effects and things to watch out for