A bulge in the bone behind the ear is usually normal if there is no physical abnormality. If the bulge grows or is accompanied by pain or other abnormalities, it is most likely not normal.
Whether or not a bump behind the ear is normal depends on the cause and symptoms. If there is no other physical abnormality, diagnosed by the doctor is not due to disease, this situation is usually normal, may be the mastoid process, the mastoid process exists in the back of the human ear, the shape is similar to a cone or conical, can be touched by hand, some of the better developed people, the mastoid process at the bone is more protruding.
If the patient also has localized pain or a hard, fast-growing or slow-growing lump on the bump, this is usually abnormal and may be caused by a bone tumor, sebaceous cyst, or enlarged lymph nodes behind the ear.
It is recommended to go to the regular hospital for timely diagnosis of those who find the bone protruding behind the ear, and actively cooperate with the doctor for treatment if it is caused by the disease.