What Is Sebaceous Cyst / Wen? Skin Lump, Causes & Removal Options A “sebaceous cyst” or wen is a common name for a benign skin lump that is usually an epidermoid cyst or a pilar cyst filled with keratin

What Is Scleroderma? Skin Hardening, Causes & Treatment Options Scleroderma is a group of disorders in which inflammation and excessive collagen lead to fibrosis, making affected skin or other tissues unusually hard, thick or tight. The fibrotic tissue is

What Are Scars? Skin Healing Marks, Causes & Treatment Options A scar is collagen-rich fibrous tissue that forms when the skin repairs an injury deep enough to disrupt its normal structure. Scar tissue closes and strengthens the injured area,

What Is Scalp Folliculitis? Scalp Bumps, Causes & Treatment Options Scalp folliculitis is inflammation of hair follicles on the scalp that commonly causes small itchy or tender follicle-centered bumps and pustules that may become scratched, sore or crusted. The

What Is Scabies? Itchy Skin Mites, Spread & Treatment Options Scabies is a contagious skin infestation caused by the human itch mite, Sarcoptes scabiei var. hominis, which burrows into superficial skin and triggers an immune reaction that produces intense

What Is Rubella? Skin Rash, Symptoms & Treatment Options Rubella is a contagious systemic viral infection that may cause a short-lived generalized rash, swollen lymph nodes and mild systemic symptoms, although some infected people have few or no noticeable