Pruritus Itch

Causes of Localized Pruritus

Body Region

Examples

Scalp

Pediculosis capitis (lice), psoriasis, seborrheic dermatitis

Trunk

Contact dermatitis (axillae, waistline), erythrasma (axillae), pediculosis corporis, psoriasis, scabies, seborrheic dermatitis (chest), seborrheic keratoses, urticaria

Groin

Candida, contact dermatitis, erythrasma, pediculosis pubis, scabies, tinea cruris

Anal region

Candidiasis, contact dermatitis, gonorrhea, hemorrhoids, pinworms, psoriasis, tinea cruris

Hands

Contact dermatitis, eczema (atopic, dyshidrotic), scabies

Legs

Atopic dermatitis, dermatitis herpetiformis (knees), lichen simplex chronicus (malleoli), nummular eczema, stasis dermatitis

Feet

Contact dermatitis, dyshidrotic eczema, pitted keratolysis, tinea pedis

Causes of Generalized Pruritus

Body Region

Examples

Skin diseases

Contact dermatitis; dermatitis herpetiformis; eczema—atopic, nummular, bullous pemphigoid, mycosis fungoides, psoriasis, PUPPP, urticaria, xerosis

Endocrine disorders

Carcinoid syndrome, diabetes, hypo- & hyperthyroidism

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Causes of Generalized Pruritus (Continued)

Body Region

Examples

Infectious diseases

Hepatitis C, HIV, pediculosis, scabies

Psychiatric disease

Anxiety, delusions of parasitosis, depression

Systemic disease

Chronic renal failure, drugs (medicine, drugs of addiction/abuse), hemochromatosis, hepatic cholestasis, pregnancy (e.g., cholestasis of pregnancy), primary biliary cirrhosis

Hematopoietic disorders

Hodgkin's disease, iron deficiency, anemia, lymphoma, polycythemia rubra vera

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Skin Manifestations of Systemic Disease

Skin Manifestations of Chronic Renal Failure

Skin Manifestations of Chronic Renal Failure

Changes in skin pigmentation: Bruising, hyperpigmented palms & soles, pallor, photodistributed or diffuse hyperpigmentation, uremic frost, yellow tinge

Infections: Onychomycosis, tinea pedis

Nail changes: Half-and-half nails, pale nails, splinter hemorrhages

Pruritus

Xerosis

Keratotic palmoplantar pits

Perforating disorders: Kyrle disease, reactive perforating collagenosis

Calcinosis cutis

Skin Manifestations of Endocrine Diseases

Acromegaly: Acanthosis nigricans, soft tissue hypertrophy, seborrheic dermatitis Addison's disease: Increased skin pigmentation Cushing's syndrome: Acanthosis nigricans, acne, fat maldistribution (e.g., "Buffalo hump"), hirsutism, ruddy skin with telangiectasia, striae, thin & atrophic skin

Diabetes: Acanthosis nigricans, bullous diabeticorum, diabetic dermopathy, foot ulcers, fungal & bacterial skin infections, granuloma annulare (controversial), necrobiosis lipoidica (diabeticorum), pruritus, scleredema, skin tags, yellow skin & nails Hyperthyroidism: Fine hair, hair loss, hyperhidrosis, onycholysis, pretibial myxedema, pruritus, warm smooth skin Hypothyroidism: brittle nails, broken hair, coarse hair, diffuse hair loss, loss of outer third of eyebrow, pruritus, thickened yellow skin, xeroderma

Skin Manifestations of Gastrointestinal Diseases

Acrodermatitis enteropathica: Abnormality in zinc absorption Dermatitis herpetiformis: Gluten-sensitive enteropathy Eczema (flexural): Malabsorption, mild zinc deficiency Gardner's syndrome: Large intestinal polyps

Liver disease, chronic: Dilated abdominal wall veins, gynecomastia, jaundice, loss of body hair, palmar erythema, peripheral edema, purpura, spider angiomas, Perineal ulceration, sinus tracts: Crohn's disease Peutz-Jeghers syndrome: Small intestine polyps Pyoderma gangrenosum: Crohn's disease, rheumatoid arthritis, ulcerative colitis

Skin Manifestations of Other Systemic Diseases

Hyperlipidemia: Xanthomas — tendinous, tuberous, eruptive Neurofibromatosis: Café au lait macules, freckling (axillary, inguinal; "Crowe's sign"), multiple cutaneous neurofibromas Pellagra (nicotinic acid deficiency): 3Ds — dementia, dermatitis, diarrhea; erythema following sun exposure Porphyria: Blister formation, hypertrichosis, milia, photosensitivity, pigmentation, skin fragility Sarcoidosis: Blue-red subcutaneous nodules, lupus pernio, sarcoid in scar

Scurvy: Bleeding gums, coiled hairs, perifollicular purpura, poor wound healing

Tuberous sclerosis: Confetti macules, enamel pits, facial angio-fibromas, forehead plaque, gingival fibromas, hypomelanotic macules, periungual fibromas, Shagreen patch

Nail plate

Distal nail fold

Anterior ligament

Nail bed Cuticle Eponychium

Nail plate

Periungual Pigmentation Nail

Lunula

Distal edge of nail plate

Cuticle Eponychium

Nail matrix

Posterior ligament

Lateral nail fold

Lunula

Natural Treatments For Psoriasis

Natural Treatments For Psoriasis

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Responses

  • trahand
    Where is the ligament of the nail?
    6 years ago

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