Welcome in H.C.M.
I have gone through your query regarding small bumps behind the ear and near the side of nostril
. These bumps on pressing oozes out thick ,bad smelling, whitish material. You told that your skin is oily.
Considering these facts I think most probably you are having sebaceous cyst
. As far as treatment is concern you should take wide spectrum antibiotic, Anti-inflammatory along with vitamins
If this conservative treatment fails than they can be removed by laser