It is not uncommon for a 1-year-old child to go through periods of not wanting to eat. This could be due to their developmental stage and may also be related to teething discomfort. You can try giving them acetaminophen to help with any pain they may be experiencing. Remember to consult with a pharmacist for the correct dosage based on your child's weight. It is important to remain patient and not be alarmed by these phases as they are a normal part of child development. If you have any further questions, do not hesitate to ask for guidance.