Dermatology – 101 – Conditions-21-40

Dermatology is a key part of General Practice. Here is a list of 101 common dermatological conditions in approximate order of incidence. Click on the link for more details.

  1. Acne
  2. Atopic Dermatitis
  3. Contact Dermatitis
  4. Psoriasis
  5. Seborrheic Dermatitis
  6. Rosacea
  7. Urticaria
  8. Tinea
  9. Herpes Simplex
  10. Varicella Zoster
  11. Impetigo
  12. Scabies
  13. Cellulitis
  14. Basal Cell Carcinoma
  15. Squamous Cell Carcinoma
  16. Melanoma
  17. Actinic Keratosis
  18. Alopecia
  19. Warts
  20. Corns and Calluses
  21. Athlete’s Foot
  22. Nail Fungal Infections
  23. Molluscum Contagiosum
  24. Vitiligo
  25. Pityriasis Rosea
  26. Ichthyosis
  27. Keratosis Pilaris
  28. Lichen Planus
  29. Sunburn
  30. Photodermatoses
  31. Cutaneous Drug Reactions
  32. Intertrigo
  33. Pilonidal Cyst
  34. Epidermoid Cysts
  35. Lipomas
  36. Folliculitis
  37. Milia
  38. Hidradenitis Suppurativa
  39. Perioral Dermatitis
  40. Cutaneous Lupus Erythematosus
  41. Scleroderma
  42. Cutaneous Candidiasis
  43. Dermatophytosis
  44. Erythema Multiforme
  45. Telangiectasia
  46. Spider Naevi
  47. Angiomas
  48. Keloids and Hypertrophic Scars
  49. Melasma
  50. Hand Dermatitis
  51. Dyshidrotic Eczema
  52. Pediculosis
  53. Bed Bug Bites
  54. Cherry Angiomas
  55. Sebaceous Hyperplasia
  56. Seborrheic Keratosis
  57. Acanthosis Nigricans
  58. Lentigines
  59. Purpura
  60. Cutaneous Tags
  61. Stasis Dermatitis
  62. Cutaneous Vasculitis
  63. Cutaneous Sarcoidosis
  64. Pemphigus Vulgaris
  65. Bullous Pemphigoid
  66. Dermatomyositis
  67. Paronychia
  68. Erysipelas
  69. Naevi
  70. Pyogenic Granuloma
  71. Pityriasis Alba and Pityriasis Versicolour
  72. Pityriasis Lichenoides
  73. Discoid Eczema
  74. Pruritus Ani
  75. Pruritus Vulvae
  76. Mastocytosis
  77. Ganglion Cyst
  78. Hemangiomas
  79. Raynaud
  80. Erythema Nodosum
  81. Lichen Sclerosus
  82. Granuloma Annulare
  83. Morphea
  84. Lichen Simplex Chronicus
  85. Actinic Prurigo
  86. Dermatofibroma
  87. Harlequin Ichthyosis
  88. Acrodermatitis Enteropathica
  89. Rosacea Fulminans
  90. Syringomas
  91. Fox
  92. Porokeratosis
  93. Darier’s Disease
  94. Perforating Dermatoses
  95. Behçet’s disease
  96. Xanthomas
  97. Erythrasma
  98. Condyloma Acuminatum
  99. Erythema Ab Igne
  100. Porphyria

21. Athlete’s Foot

  • Description: Fungal infection of the foot, causing itching, redness, and cracking.
  • Associations: Damp, communal environments, tight-fitting shoes.
  • Management: Antifungal creams or powders, keeping feet dry, changing socks regularly.
  • Dermnet: https://dermnetnz.org/topics/tinea-pedis

22. Nail Fungal Infections

  • Description: Fungal infection of the nails, causing discoloration, thickening, and brittleness.
  • Associations: Aging, diabetes, nail trauma, damp environments.
  • Management: Oral antifungal medications (terbinafine), antifungal nail lacquers, sometimes nail removal.
  • Dermnet: https://dermnetnz.org/topics/fungal-nail-infections

23. Molluscum Contagiosum

  • Description: Viral infection (poxvirus) causing small, painless bumps on the skin.
  • Associations: Skin-to-skin contact, sharing towels or clothing.
  • Management: Often resolves spontaneously, treatments include cryotherapy, curettage, topical therapy.
  • Dermnet: https://dermnetnz.org/topics/molluscum-contagiosum

24. Vitiligo

  • Description: Loss of skin pigment, resulting in white patches on the skin.
  • Associations: Autoimmune conditions, family history.
  • Management: Phototherapy, topical corticosteroids, skin grafting, cosmetics to camouflage.
  • Dermnet: https://dermnetnz.org/topics/vitiligo

25. Pityriasis Rosea

  • Description: Rash that begins as a large patch (herald patch), followed by smaller ones, often in a Christmas tree pattern.
  • Associations: Possibly viral, more common in spring and fall.
  • Management: Often self-limiting, topical steroids for itch, antihistamines, UVB light.
  • Dermnet: https://dermnetnz.org/topics/pityriasis-rosea

26. Ichthyosis

  • Description: Group of skin disorders causing dry, scaly skin.
  • Associations: Mostly genetic, sometimes acquired.
  • Management: Regular moisturizing, retinoids for severe cases, avoiding harsh soaps.
  • Dermnet: https://dermnetnz.org/topics/ichthyosis-vulgaris

27. Keratosis Pilaris

  • Description: Small, rough bumps on the skin, usually on arms, thighs, cheeks.
  • Associations: Dry skin, atopic dermatitis.
  • Management: Moisturizing creams, exfoliating, topical retinoids.
  • Dermnet: https://dermnetnz.org/topics/keratosis-pilaris

28. Lichen Planus

  • Description: Inflammatory condition causing purplish, itchy, flat-topped bumps on the skin.
  • Associations: Immune system, hepatitis C infection, certain medications.
  • Management: Topical corticosteroids, oral medication for severe cases, UVB light therapy.
  • Dermnet: https://dermnetnz.org/topics/lichen-planus

29. Sunburn

  • Description: Red, painful skin that feels hot to the touch, caused by too much sun exposure.
  • Associations: UV radiation, fair skin, lack of sunscreen.
  • Management: Cool baths, moisturizers, over-the-counter pain relief, hydration.
  • Dermnet: https://dermnetnz.org/topics/sunburn

30. Photodermatoses

  • Description: Skin reaction to sunlight, causing rashes or bumps.
  • Associations: Exposure to UV light, more common in women and fair-skinned individuals.
  • Management: Sun protection, topical corticosteroids, antimalarial medication for chronic cases.
  • Dermnet: https://dermnetnz.org/topics/polymorphic-light-eruption

31. Cutaneous Drug Reactions

  • Description: Wide range of skin reactions due to medication.
  • Associations: Antibiotics, NSAIDs, anticonvulsants, and many others.
  • Management: Discontinuation of the offending drug, topical or oral corticosteroids.
  • Dermnet: https://dermnetnz.org/topics/drug-eruptions
  • Too many possibilities

32. Intertrigo

  • Description: Inflammation of skin folds caused by skin-on-skin friction in warm, moist areas, often with superinfection with Candida albicans
  • Associations: Obesity, diabetes, heat, and humidity.
  • Management: Keeping the area dry, topical antifungals or antibacterials, barrier creams.
  • Dermnet: https://dermnetnz.org/topics/intertrigo

33. Pilonidal Cyst

  • Description: Painful cyst or abscess near the tailbone, often with hair.
  • Associations: Long periods of sitting, excess body hair.
  • Management: Incision and drainage, antibiotics, surgery for recurrent cases.
  • Dermnet: https://dermnetnz.org/topics/pilonidal-disease

34. Epidermoid Cysts

  • Description: Small, round lumps under the skin, possibly with a central pore; filled with keratin.
  • Associations: Develops when skin cells multiply instead of shedding.
  • Management: Often no treatment needed, surgical removal if bothersome.
  • Dermnet: https://dermnetnz.org/topics/epidermoid-cyst

35. Lipomas

  • Description: Soft, fatty lumps under the skin, usually noncancerous.
  • Associations: Genetic factors, more common with age.
  • Management: Generally no treatment required, removal for discomfort or cosmetic reasons.
  • Dermnet: https://dermnetnz.org/topics/lipoma-and-liposarcoma

36. Folliculitis

  • Description: Inflammation of the hair follicles, causing red, pimple-like bumps.
  • Associations: Bacterial or fungal infection, irritation from shaving, hot tubs.
  • Management: Topical antibiotics or antifungals, good hygiene, avoiding irritants.
  • Dermnet: https://dermnetnz.org/topics/folliculitis

37. Milia

  • Description: Small, white bumps on the skin, especially on the face, caused by keratin buildup.
  • Associations: Skin damage (like sunburn), use of steroid creams, newborns.
  • Management: Often resolve on their own, extraction by a professional if necessary.
  • Dermnet: https://dermnetnz.org/topics/milium

38. Hidradenitis Suppurativa

  • Description: Chronic skin condition causing abscesses and scarring, primarily in the armpits and groin (apocrine gland locations)
  • Associations: Hormones, genetics, obesity, smoking.
  • Management: Antibiotics, biologics, surgery for severe cases, lifestyle changes.
  • Dermnet: https://dermnetnz.org/topics/hidradenitis-suppurativa
Hidradenitis suppurativa; nodules and scars, including a pleated scar.

39. Perioral Dermatitis

  • Description: Rash around the mouth, small red bumps or pus bumps, and mild peeling.
  • Associations: Topical steroid use, skin care products, hormonal changes.
  • Management: Discontinuing triggering products, oral or topical antibiotics.
  • Dermnet: https://dermnetnz.org/topics/periorificial-dermatitis

40. Cutaneous Lupus Erythematosus

  • Description: Autoimmune disorder causing a rash on areas of the skin exposed to sunlight.
  • Associations: Systemic lupus erythematosus, sun exposure.
  • Management: Sun protection, topical corticosteroids, antimalarial drugs for systemic involvement.
  • Dermnet: https://dermnetnz.org/topics/cutaneous-lupus-erythematosus