What should I do if I have a bump behind my ear that hurts when I press on it?

A bag behind the ear that hurts when pressed may be lymphadenitis behind the ear, sebaceous cysts accompanied by infection, you should consult a doctor in a timely manner, according to the doctor’s instructions to take antibiotics sensitive to the causative organisms.
1. Post-auricular lymphadenitis: otitis media, scalp inflammation, tonsillitis, etc. can cause post-auricular lymphadenitis, the patient will have localized lumps, pain, and in severe cases will be accompanied by generalized fever.
Patients should maintain a regular routine, ensure adequate sleep, do not eat spicy and stimulating food, under the guidance of the doctor to take antibiotics sensitive to the causative organisms, some patients also need to use topical medication and oral Chinese patent medicine.
2. Sebaceous cysts: Sebaceous cysts caused by sebaceous gland duct blockage in the skin, when accompanied by bacterial infections, there will be localized pressure and pain, redness and swelling, as well as fluctuating sensation. When a cyst becomes infected, it can be treated with antibiotics that are sensitive to the causative organism, physical therapy to promote inflammation, and surgery to remove the cyst after the inflammation subsides.
The pressure and pain of the mass behind the ear can also be congenital gill slit fistula cyst with infection, acute mastoiditis, etc. Therefore, it is recommended to go to the hospital in time to see a doctor to determine the cause of the disease, and then targeted standardized treatment and medication.