The main warning sign is selective eating from childhood, and the following are also indicative:

• Having a lack of interest in food and eating from early childhood.
• Present weight loss and signs of malnutrition.
• Constantly verbalizing lack of appetite or gastrointestinal disturbances (abdominal pain, feeling of fullness, constipation, nausea, flatulence, among others).
• Eat very slowly and in small portions.
• Having specific fears of vomiting, suffocating, swallowing, choking, among others.
• Rejecting food because of its sensory characteristics (color, texture, smell or taste).
• Presenting family conflicts surrounding food and eating habits.
• Avoiding socialization due to food-related issues. For example, children who don't want to go to birthday parties, school outings, or who want to avoid the school cafeteria.