
What Causes Swelling Behind Left Ear?

Abscess or infected sebaceous cyst.
Detailed Answer:
Hi,
Thank you for using Healthcare Magic. From the information you have provided, the most likely causes of the swelling are either an abscess or a cyst. As the swelling developed overnight, I suspect this is an abscess. This is why it is painful. It could be a sebaceous cyst that has become infected which would also cause pain.
I suggest you may need antibiotics. Therefore, I advise you see your doctor in the next 24 hours or go to the ED. You can then be examined for confirmation.
In the meantime, continue with the pain-killers and keep the area clean.
I hope this is of help. If you have any further questions, please do not hesitate to contact me.
Regards,
Dr K A Pottinger,
MBChB FRCA

Answered by

Dr. Kerry Pottinger
Pain Medicine & Palliative Care Specialist
Practicing since :1983
Answered : 1337 Questions
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