A 2-year-old child’s teething crying at night may be caused by uncomfortable teething or gingivitis. 1. Teething discomfort: it may be due to the fact that when children are teething, they feel uncomfortable because of localized swelling and pain in the gums, so they cry at night. 2. Gingivitis: children in the long teeth often lead to cracks in the gum area, if you do not pay attention to oral hygiene, may lead to localized inflammation of the gums, resulting in redness, swelling and pain, and there may even be symptoms of general discomfort, such as fever, fatigue, etc., the children feel uncomfortable will cry at night. 2-year-old child long teeth crying at night, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.