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You are here : AllRefer.com > Health > Medical Symptoms > Rashes

Rashes

Alternate Names : Skin redness or inflammation, Skin lesion, Rubor, Skin rash, Erythema


Definition

Rashes involve changes in the color or texture of your skin.

Overview & Considerations
Often, the cause of a rash can be determined from its visible characteristics and other symptoms.
Common Causes

A simple rash is called dermatitis, meaning inflammation of the skin. Contact dermatitis is caused by things your skin touches, such as:

  • Chemicals in elastic, latex, and rubber products
  • Cosmetics, soaps, and detergents
  • Dyes and other chemicals in clothing
  • Poison ivy, oak, or sumac

Seborrheic dermatitis is a rash that appears in patches of redness and scaling around the eyebrows, eyelids, mouth, nose, the trunk, and behind the ears. If it happens on your scalp, it is called dandruff in adults and cradle cap in infants.

Age, stress, fatigue, weather extremes, oily skin, infrequent shampooing, and alcohol-based lotions aggravate this harmless but bothersome condition.

Other common causes of a rash include:

  • Eczema (atopic dermatitis) -- tends to happen in people with allergies or asthma. The rash is generally red, itchy, and scaly.
  • Psoriasis -- tends to occur as red, scaly, itchy patches over joints and along the scalp. Fingernails may be affected.
  • Impetigo -- common in children, this infection is from bacteria that live in the top layers of the skin. Appears as red sores that turn into blisters, ooze, then crust over.
  • Shingles -- a painful blistered skin condition caused by the same virus as chickenpox. The virus can lie dormant in your body for many years and re-emerge as shingles.
  • Childhood illnesses such as chicken pox, measles, roseola, rubella, hand-foot-mouth disease, fifth disease, and scarlet fever.
  • Medications and insect bites or stings.

Many medical conditions can cause a rash as well. For example:

Pictures & Images

Poison oak rash on the arm
Poison oak rash on the arm

Erythema toxicum on the foot
Erythema toxicum on the foot

Acrodermatitis
Acrodermatitis

Roseola
Roseola

Shingles
Shingles

Cellulitis
Cellulitis

Erythema annulare centrifugum - close-up
Erythema annulare centrifugum - close-up

Psoriasis, guttate on the arms and chest
Psoriasis, guttate on the arms and chest

Psoriasis, guttate on the cheek
Psoriasis, guttate on the cheek

Systemic lupus erythematosus rash on the face
Systemic lupus erythematosus rash on the face

Poison ivy on the knee
Poison ivy on the knee

Poison ivy on the leg
Poison ivy on the leg

Erythema multiforme, circular lesions - hands
Erythema multiforme, circular lesions - hands

Erythema multiforme, target lesions on the palm
Erythema multiforme, target lesions on the palm

Erythema multiforme on the leg
Erythema multiforme on the leg

      See all Pictures & Images



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Review Date : 8/8/2009
Reviewed By : Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.



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