What are the symptoms of infant formula allergy?

Infant formula allergy presents with various symptoms, mainly including: 1. **Skin symptoms**: Such as eczema and urticaria, commonly appearing on the face, arms, legs, etc., possibly accompanied by itching and swelling. 2. **Gastrointestinal symptoms**: Including nausea, vomiting, bloating, diarrhea, or constipation. Some infants may also experience increased frequency of bowel movements or stools resembling egg drop soup. Severe formula allergy may lead to blood in the stool. 3. **Respiratory symptoms**: Such as coughing, nasal congestion, and runny nose, possibly accompanied by allergic rhinitis. Severely allergic infants may also develop laryngitis. 4. **Other symptoms**: Some infants may also exhibit poor growth and development, excessive crying, and restless sleep. Parents should closely observe their infants' reactions. If allergy symptoms occur, feeding with the formula should be stopped immediately, and medical evaluation and treatment should be sought.