1 / 7

Contact Dermatitis

Contact Dermatitis. Pathogenesis of Dermatitis. Irritants. Allergens type 1&4. Infection. Endogenous factors. Contact Dermatitis. Acute -redness, itching, vesiculation Chronic - scaly desquamation Site and morphology determined by causative exposure

yoko
Download Presentation

Contact Dermatitis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Contact Dermatitis

  2. Pathogenesis of Dermatitis Irritants Allergens type 1&4 Infection Endogenous factors

  3. Contact Dermatitis • Acute -redness, itching, vesiculation • Chronic - scaly desquamation • Site and morphology determined by causative exposure • Irritant - caustic agents or detergents -hands • ‘Allergic’ - rash 6-12 hours peaking at 48-72 hours

  4. Irritant contact dermatitis • Skin damaged directly by the irritant • soaps, detergents, water, solvents, dry atmosphere etc • very, very common • at least 5% of the population suffer from hand dermatitis • Treat with emollients/moisturisers

  5. Delayed “allergy” • Takes the immune system a few hours to react • Allergic contact dermatitis (ACD) • Common causes: • nickel • fragrances • rubber additives • preservatives • plants • medicaments etc

  6. Sensitizers • Nickel - wear >18 carat gold • Rubber accelerators in elastic, gloves, shoes • Permanent hair dyes -paraphenylenediamine • Fragrances eg Balsam of Peru and cinnamic aldehyde present in cosmetics, soaps, perfumes and toothpastes - use ‘fragrance free’ products not just unscented. • Adhesives and Varnishes • Latex, Formaldehyde and Chromates • Benzocaine and neomycin in topical medications

  7. ACD • Nickel allergy involves ears, skin under buckles and often the hands; accidental spread from the hands can affect the face • Hair products - dyes and sprays - affect the face, neck and ears. • Dyes in socks and shoes affect the feet. • Medications for the treatment of leg ulcers can cause dermatitis of the legs

More Related