What Is Onycholysis? Nail Lifting, Causes & Treatment Options
What Is Onycholysis? Nail Lifting, Causes & Treatment Options Onycholysis is separation of the nail plate from the underlying nail bed, usually creating a sharply defined white or opaque area that begins near the nail tip or side. The remaining attached nail looks pink because it still lies against the vascular nail bed, while either […]
What Is Onychogryphosis? Thick Curved Nails, Causes & Treatment Options
What Is Onychogryphosis? Thick Curved Nails, Causes & Treatment Options Onychogryphosis is a structural nail-growth disorder in which the nail becomes markedly thick, hard, elongated and progressively curved, eventually producing the characteristic ram’s-horn appearance. The great toenail is affected most often, although other toenails and, less commonly, fingernails can be involved. Acquired onychogryphosis is associated […]
What Is Ocular Rosacea? Eye and Skin Symptoms, Causes & Treatment Options
What Is Ocular Rosacea? Eye and Skin Symptoms, Causes & Treatment Options Ocular rosacea is the eye and eyelid manifestation of rosacea, commonly causing chronic burning, grittiness, dryness, redness and eyelid inflammation through meibomian-gland and tear-film dysfunction. Symptoms can include stinging, watering, foreign-body sensation and fluctuating or blurred vision, while rosacea-associated blepharitis and meibomian-gland dysfunction […]
What Is Nummular Eczema? Coin-Shaped Rash, Causes & Treatment Options
What Is Nummular Eczema? Coin-Shaped Rash, Causes & Treatment Options Nummular eczema is a chronic or recurrent form of eczema that produces intensely itchy, well-defined round or oval plaques that can become blistered, weepy, crusted, dry or scaly. Also called nummular dermatitis or discoid eczema, it most often affects the arms and lower legs and […]
What Is Nevus Sebaceous? Skin Patch Appearance, Risks & Treatment Options
What Is Nevus Sebaceous? Skin Patch Appearance, Risks & Treatment Options Nevus sebaceous is a congenital organoid hamartoma that usually appears as a smooth, hair-poor or hairless patch on the scalp or face and becomes thicker or more verrucous around puberty. It contains abnormal development of several skin structures, including the epidermis, sebaceous glands, hair […]
What Is Nevus of Ota? Skin Pigmentation, Causes & Treatment Options
What Is Nevus of Ota? Skin Pigmentation, Causes & Treatment Options Nevus of Ota is a usually unilateral form of dermal melanocytosis that causes flat blue-grey, slate-brown or brown-violet pigmentation around the eye and may also pigment structures inside the eye. The colour comes from melanocytes and melanin located within the dermis rather than from […]
What Is Neurodermatitis? Itchy Skin Thickening, Causes & Treatment Options
What Is Neurodermatitis? Itchy Skin Thickening, Causes & Treatment Options Neurodermatitis, also called lichen simplex chronicus, is a chronic localized itch disorder in which repeated scratching or rubbing causes the skin to become thick, rough and leathery. This lichenification exaggerates normal skin lines and usually forms one or several well-defined plaques in areas that are […]
What Is Necrotizing Fasciitis? Severe Skin Infection, Warning Signs & Emergency Treatment
What Is Necrotizing Fasciitis? Severe Skin Infection, Warning Signs & Emergency Treatment Necrotizing fasciitis is a rapidly progressive bacterial infection of deep soft tissue and fascia that requires immediate hospital treatment and urgent surgical assessment. It is one form of necrotizing soft-tissue infection, or NSTI, and can cause vascular injury, tissue necrosis, sepsis and shock […]
What Is Necrobiosis Lipoidica? Skin Patches, Causes & Treatment Options
What Is Necrobiosis Lipoidica? Skin Patches, Causes & Treatment Options Necrobiosis lipoidica is a rare chronic granulomatous skin disease that most often affects the shins and produces enlarging yellow-brown atrophic plaques with an inflammatory red-purple border. Granulomatous inflammation, collagen degeneration and vascular change drive the transition from early red-brown lesions to thin shiny mature plaques. […]
What Is Nail Psoriasis? Nail Changes, Causes & Treatment Options
What Is Nail Psoriasis? Nail Changes, Causes & Treatment Options Nail psoriasis is psoriatic inflammation of the structures that produce and support the nail, especially the nail matrix and nail bed. Matrix inflammation can produce pitting, ridges, white changes and crumbling, while nail-bed inflammation can cause oil-drop discoloration, lifting, subungual thickening and splinter haemorrhages. Psoriatic […]