Bleeding in 2-year-old babies after pulling out their ears with cotton swabs may be caused by mechanical damage to the external auditory canal or tympanic membrane due to excessive force. Due to the 2-year-old children’s skin is more fragile, and the outer ear canal is relatively narrow compared to adults, in the use of cotton swabs for pulling out the ear, the cotton swabs and the narrow outer ear canal friction, which may lead to skin and mucous membrane damage and bleeding; and due to the outer ear canal is shorter than the adults, so it may be in the pulling out of the ear damage to the deeper tympanic membrane, resulting in bleeding. The human ear canal has a certain self-cleaning ability, it is not recommended to use cotton swabs to pull out the ears of young children, if you suspect cerumen embolism or foreign bodies in the ear canal and other diseases, it is recommended to go to the hospital and be disposed of by a medical professional.