The tympanic scarring produces tympanosclerosis, which is also called tympanic ventricular vitreous degeneration, and is caused by the deposition of plaques of collagen tissue under the epithelium of the tympanic mucosa, mostly on the tympanic ventricular mucosa and the auditory bone. It involves the upper tympanic chamber more severely and the lower tympanic chamber less severely, with the hammer bone, anvil, stapes and tendons being the most susceptible, thus causing much deafness. This condition was discovered by Cassebohm in the 18th century but did not receive much attention until recent times (1955), when numerous microscopic otologic procedures were performed. The following diseases may also be the cause of tympanic scarring: 1. Herpetic tympanitis Herpetic tympanitis, or hemorrhagic herpetic tympanitis, is an acute inflammation of the tympanic membrane and the skin of the external ear canal adjacent to the tympanic membrane caused by a viral infection, mostly in children and adults under 30 years of age, and is a viral inflammation accompanied by a cold or flu with severe pain in the ear. 2. Blue tympanic membrane and cholesterol granuloma Cholesterol is a type of lipid. Its important physiological functions in the human body include: (1) it is a component of cell membranes, which control the absorption of nutrients and the excretion of metabolic wastes, (2) it is a raw material for the synthesis of bile acids and vitamin D3, the former of which helps digestion and absorption of fats, and the latter of which prevents rickets in children, and (3) it is a raw material for the synthesis of steroid hormones, especially sex hormones and adrenocorticotropic hormones. These hormones are essential to human health and human reproduction. 3, keloid keloid (keloid) is the healing process of skin injury, collagen anabolic function lost normal restraint control, continued in a hyperactive state, resulting in excessive proliferation of collagen fibers, also known as connective tissue hyperplasia, in Chinese medicine is called crabfoot swelling or giant scar, it is manifested as a bulge out of the normal skin, the shape varies, red and hard benign lumps. 4. Tympanic membrane perforation Tympanic membrane perforation is a kind of middle ear trauma caused by violence, traffic accident, or air pressure change, and belongs to the “ear door leakage tube” in Chinese medicine. Category. Tympanic membrane perforation is frequently encountered in forensic clinical identification and can be caused by many factors, mainly traumatic (direct or indirect external force) and inflammatory tympanic membrane perforation, the former can be caused by blunt tool (including palm, fist, etc.), skull base fracture, explosion, inadvertent ear digging, needle puncture, scalding and even insects in the ear. The traumatic tympanic membrane perforation discussed here mainly refers to the traumatic tympanic membrane perforation caused by indirect external force, while the inflammatory tympanic membrane perforation is mainly caused by acute otitis media and chronic otitis media. 5, tympanosclerosis tympanosclerosis is also known as tympanic glass degeneration, which is the deposition of plaque-like collagen tissue under the epithelium of the tympanic chamber mucosa, mostly occurs in the tympanic chamber mucosa and the auditory bone, and those occurring on the tympanic membrane are still called calcified plaques, making the tympanic chamber mucosa into a mammillary-like substance, covering the auditory bone, oval window and around the round window, adhering to the bone, as if coated with an envelope, involving the upper tympanic chamber heavier, involving the lower tympanic chamber lighter, hammer bone, anvil bone, stapes and muscle The hammer bone, anvil, stapes and tendons are most likely to be involved, resulting in a high number of deafness. It was discovered by Cassebohm in the 18th century, but did not receive much attention until the recent era (1955), when a large number of microscopic otologic procedures were performed. 6. Deafness is clinically classified into conduction deafness caused by lesions in the outer and middle ear; neurological deafness caused by lesions in the inner ear and the auditory nerve; and mixed deafness caused by lesions in the outer middle ear and the middle ear auditory nerve together. There are many causes of deafness, including heredity, birth injury, infection, improper drug application, immune disorders, physiological degeneration, and poisoning by certain chemicals. It is important to detect, diagnose and treat deaf patients as early as possible. For conductive deafness and mixed deafness, the cause should be investigated and treated thoroughly to improve the inner environment of the middle ear and the sound transmission function to restore hearing to the maximum extent.