A 2-year-old child crying in bed at night is related to poor sleep environment, excessive brain excitement, pinworm infection or calcium and vitamin D deficiency. Parents should pay attention to observe whether the child has other abnormal symptoms and take the child to the doctor for examination in time. Common causes 1, poor sleep environment: baby’s sleep environment is too hot or too cold, which will lead to the baby feel irritable, crying phenomenon; 2, excessive brain excitement: baby’s brain is overexcited, still in a state of excitement before going to bed, unable to self-adjust into a deep sleep state, prone to sleep crying phenomenon; 3, frightened: baby see scared images during the day to be frightened, nightmares at night to wake up 4, pinworm infection: pinworm activity is more frequent at night, resulting in itching around the anus, which can cause the baby to cry, affecting sleep, and also appear to lose appetite, abdominal pain, diarrhea and other performance; 5, calcium and vitamin D deficiency: baby calcium and vitamin D deficiency leads to the normal development of skeletal muscle is affected, sleep at night to feel growing pains, and thus appear to sleep The phenomenon of crying occurs. Treatment 1, baby dreaming and crying, parents can hug the child, more soothing, if necessary, can follow medical advice to the child for drug treatment; 2, suffering from pinworm infection, parents can be under the guidance of the doctor to the child application of deworming medicine; 3, baby calcium deficiency, can be under the guidance of the doctor oral calcium gluconate oral solution to supplement calcium treatment. Note parents should provide a good sleep environment for their children, to quiet without harsh light as the principle, and pay attention not to let the baby touch the TV, electronic products, etc. before bedtime, so as not to over-stimulate the visual.