Digging earwax to dig out a large black ear knot, may be cerumen in the ear canal, old blood crust in the ear canal, fungal clumps. 1. Cerumen in the ear canal: usually do not have the habit of pulling out the ears, some patients have long-term cerumen retention in the ear canal, if oxidation occurs, it may lead to black color, you can pull out a large piece of black matter. 2. Old scabs: There is damage to the ear canal before, and scabs can be formed after bleeding, and the color of the scabs is usually darker. When pulling out the ear, the scab may be pulled out, and black material can be pulled out. 3. Fungal clumps: In addition to pulling out black material from the ear canal, it is also accompanied by manifestations such as itching of the ear canal. It is necessary to carry out relevant examinations to find out whether it is related to the formation of fungal masses caused by fungal infections. Excluding the above factors, it is also necessary to find out whether it is related to the appearance of a mass in the ear canal, such as melanoma, which may pull out black new organisms, usually accompanied by bleeding or pain. It is advisable to visit the ENT department of the hospital to find the cause.