Bruising on the baby’s nose may be a physiological phenomenon, which is a normal manifestation. It may also be caused by pathological factors, it is recommended to go to the hospital, combined with the doctor’s advice treatment. 1. Physiological factors: the baby’s skin is more delicate in infancy, the fat under the skin is relatively thin, you can see the superficial veins under the skin. Especially for babies with fairer skin, the superficial veins under the skin are more obvious. When the baby is frightened or crying violently, the venous blood return is affected, resulting in increased pressure on the blood vessels will be more obvious veins. With age, subcutaneous fat gradually increased, subcutaneous blood vessels will become less and less obvious. The above factors lead to veins on the nose, is a normal performance, generally do not need special treatment. 2. Pathological factors (1) Allergic rhinitis: babies with allergic rhinitis may have symptoms such as runny nose, sneezing and nasal congestion, which may lead to bruises on the nose. (2) Indigestion: In infancy, the digestive system of the baby is not yet perfect, and if improper feeding leads to indigestion, bruises may appear on the nose. To summarize, bruises on the baby’s nose may be a normal manifestation, or may be considered to be related to certain diseases. It is recommended to observe closely and go to the pediatric department of the hospital for examination and treatment if necessary.