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The two main types of human skin are: glabrous skin, the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [3] Within the latter type, the hairs occur in structures called pilosebaceous units , each with hair follicle , sebaceous gland , and associated arrector pili muscle. [ 4 ]
Classification of these conditions often presents many nosological challenges, since underlying causes and pathogenetics are often not known. [ 6 ] [ 7 ] Therefore, most current textbooks present a classification based on location (for example, conditions of the mucous membrane ), morphology ( chronic blistering conditions ), cause ( skin ...
Very thick skin which cracks, abnormal facial features [3] [4] Complications: Breathing problems, infection, problems with body temperature, dehydration [4] Usual onset: Present from birth [3] Causes: Genetic (autosomal recessive) [3] Diagnostic method: Based on appearance and genetic testing [5] Differential diagnosis: Ichthyosis congenita ...
What it looks like: Psoriasis, another inflammatory condition that dermatologists see frequently, is known to causes scaly, itchy areas of thickened skin called plaques that can look like rashes.
Ringworm is a fungal infection that causes a red, itchy, circular rash on the skin with raised edges and a clear center, says Dr. Kamangar. The rash may be scaly, bumpy, or blistered, and can ...
The bacteria releases a toxin that causes a bright red blotchy rash that has a sandpaper-like texture, and the rash can spread to the entire body and usually first appears on the groin, neck, and ...
Harlequin color change is a cutaneous condition seen in newborn babies characterized by momentary red color changes of half the child, sharply demarcated at the body's midline. This transient change occurs in approximately 10% of healthy newborns. [ 1 ]
This rash also generally has a higher incidence in non-African-American infants with skin of color. [9] There is significant regional variation and the incidence can vary widely in other nations. For example, in Brazil, transient neonatal pustular melanosis occurs in 9.6% of all newborns. [10] TNPM occurs equally in both sexes. [9]