Four-month-old baby teething is a normal physiological phenomenon, there are some babies may not have any symptoms during teething, but there are some babies will have some abnormal performance during teething, mainly including low fever, drooling, chewing things, etc.: 1, low fever: baby may appear during teething due to inflammation of the gums, may cause low fever, low fever range generally at 37.3-38 ℃,. Do not need special treatment; 2, drooling: baby drooling during teething is a very common phenomenon. Because teething will lead to increased saliva production, so there will be drooling; 3, gnawing or chewing: baby’s gums will be itchy during teething, so the baby will take the initiative to gnaw or chew something to relieve this symptom; 4, swollen gums: teething period, the gums will have a strange feeling, or the gums have a slight inflammation resulting in swelling and other discomfort; 5, irritability: baby may have some discomfort brought about by the teeth irritability, crying and restlessness; 6, other symptoms: a small number of babies may also have red cheeks and slight diarrhea when teething. Parents can prepare some hygienic teething toys for their babies when they are teething, in order to avoid the baby’s infection with bacteria and promote the normal development of their teeth. If your baby is drooling, you need to help your baby wipe the drool in time to avoid causing eczema.