Hi, I had gone through your question and understand your concerns.
As per your information, its located at
mastoid process, there is a possibility of a condition called as
mastoiditis (infection in the mastoid bone behind the ear).For my patients i suggest putting 1 to 2 drops of a strained mixture of olive oil and garlic oil into the infected ear. Have you ever experienced
fever, headache, irritability or hearing loss?
Also there could be a possibility of a
cyst formation caused by blocked sebaceous glands also called sebaceous cysts.Heating pads and warm compresses can help drain the pus and give you some relief.
There could be other possibilities too, therefore i will recommend you to visit a doctor soon and get the proper examination done.
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us and voting. I will be happy to answer your questions.