the difference between nodule and cystic acne on white background.

acne pimple nodule cyst cystic pus nodulocystic nodular severe inflammatory skin face difference compare inflamed swollen inflammation clogged pore bump red scar formation painful large propionibacterium acnes sebum dead cell oil sebaceous gland follicle epidermis layer surface anatomy bacteria beauty body dermatology care vector problem treatment aesthetic flat design infographic diagram damage