Sebum is an oily substance secreted by units at the base of hair.
Marble sized lump below ear.
Their texture varies depending on.
Hard or soft bump behind the earlobe small pea sized or large lump painful and itchy bump on the back of the ear.
A lump on jawline by ear or lump on jaw line under ear could be due to parotid glands or tonsillar lymph node problems.
Stephen rodrigues answered 37 years experience family medicine.
These two are just under your ear with the tonsillar lymph node located just below your parotid glands.
Causes of a hard lump under the skin can include.
Soft pea size red painful lump behind right ear and feels like its dripping also a swollen lymph node below the ear near jawline.
In acne pores in the skin become blocked with sebum.
Acne is a common skin condition that might cause a lump behind the ear.
What to do.
Yes the most likely culprit is a post auricular means behind the ear lymph node but without a hands on examination and knowing your complete medical history there is no way for me to blindly.