a bump that forms under the skin

a lump within the skin and these vary in size from pin-head to pea-size or larger

a severe form of acne and is likely to leave scars

a trapping of either hair or surface skin under the skin

Small, yellowish-tan to skin colored, firm round masses just beneath the skin. These can enlarge slowly and when infected can result in scarring. Can be exacerbated by acne.