The yellow sticky stuff in the ear is considered to be caused by purulent otitis media, oily cerumen, and eczema of the ear canal. 1. Suppurative otitis media: it is a purulent inflammation of the mucous membrane of the middle ear, which can be categorized into two types: acute and chronic, and is usually caused by pneumococcus, staphylococcus, Haemophilus influenzae and other pathogenic bacteria infections. It can lead to earache, pus flow, tympanic membrane congestion, tympanic membrane perforation and hearing loss and other uncomfortable symptoms. 2. Oily cerumen: it appears in both ears at the same time, and can be related to heredity. Since cerumen is oily, it can adhere to the wall of the external auditory canal, and is a smelly yellow sticky secretion to the touch. 3. Eczema of the ear canal: when the local skin of the external ear is stimulated by certain allergens, such as cosmetics, hair spray, intake of fish, shrimp, milk, etc., can lead to the phenomenon of eczema of the external ear canal. For acute eczema, it can lead to the local appearance of small papules and blisters, and yellow watery or sticky secretions can flow out after the blisters break. As there are more causes of yellow sticky stuff in the ear, you need to go to the hospital in time for standardized treatment.