Babies have poor resistance and their systems and organs are developing, so it’s not surprising that they are prone to infections. In fact, every time a baby is sick, there are a variety of body “signals” to mothers before the hint, to remind mothers to pay attention to the early detection of the baby’s condition. 1, bad spirits, sleepy and less talkative. If it is accompanied by fever or local infection, it is time to consider the possibility of serious local inflammation or even sepsis. If not seen in time, it may be fatal. In addition, some viral infections, such as hand, foot and mouth disease, also take poor spirits as an important clue; 2. Repeated cough or diarrhea. When a child coughs, parents often think it is a respiratory infection or acute laryngitis. However, some children have allergy-induced coughs that can trigger asthma; some have gastroesophageal reflux that irritates the bronchi and causes coughing. In addition, there are children with chronic diarrhea or abnormal stool habits, which may be a sign of food allergy; 3. Pale face with bleeding spots on the skin and concentrated in the gums and nose is often considered malnutrition or fatigue, only to be found to be leukemia when examined in the hospital. Therefore, once a child is found to have a tendency to bleed, early diagnosis and treatment is advisable; 4. When a child reaches an age where he or she still cannot speak or walk, it may be a warning sign of cerebral palsy. Especially when a child is carried to the table at five or six months, appearing crossed at the tips of the feet instead of the soles, it may also be cerebral palsy. Early detection can lead to recovery through rehabilitation and comprehensive treatment; 5. Paroxysmal crying and fussing. If the child cries paroxysmally and has blood in the stool, it is likely to be intussusception and must be treated as soon as possible; 6. Not communicating with others and not answering when called, this is a warning sign for autism; 7. Choking and coughing on milk and cyanosis around the lips, this is a warning sign for heart disease and should be sent to the hospital for examination; 8. Swelling of the face and abnormal urination. This is often related to kidney disease; 9, the head is too big or too small. A head that is too small may suggest that the child’s head is not fully developed, which can limit brain development. If the head is found to be too large, be alert for central nervous development problems or the presence of hydrocephalus; 10. Repeated limb twitching or frothing. This may indicate a neurological problem, such as paroxysmal frottage, which is short in duration but recurrent and may be epilepsy. Some children often blink, sniffle, and make strange faces to suspect multiple twitching.