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This category reflects the organization of International Statistical Classification of Diseases and Related Health Problems, 10th Revision. Generally, diseases outlined within the ICD-10 codes R20-R23 within Chapter XVIII: Symptoms, signs and abnormal clinical and laboratory findings should be included in this category.
Atopic dermatitis (AD), also known as atopic eczema, is a long-term type of inflammation of the skin. [2] Atopic dermatitis is also often called simply eczema but the same term is also used to refer to dermatitis, the larger group of skin conditions. [2] [5] Atopic dermatitis results in itchy, red, swollen, and cracked skin. [2]
Notably, tick-borne Lyme disease may present with a bullseye rash, which develops within 30 days of the bite, the Mayo Clinic explains. Other symptoms: Tick bites on their own aren't necessarily ...
Biopsies are typically not necessary, and cannot be used to rule out other atopic dermatitis or other eczemas. [9] [10] However, patch testing may be employed to rule out irritants (contact dermatitis) as a cause. [6] [11] In children, nummular dermatitis is commonly confused with tinea corporis. [8]
Patch testing may be considered if there is suspicion of allergic contact dermatitis. [2] A skin biopsy is rarely necessary, [2] but if done mostly shows an interstitial granulomatous dermatitis, some lesions being spongiotic. [4] Id reactions cannot be distinguished from other skin diseases by histopathology.
Pain can also be present. Dermatitis can occur anywhere on the skin, but is most common on the hands (22% of people), scattered across the body (18%), or on the face (17%). [5] The rash and other symptoms typically occur 24 to 48 hours after the exposure; in some cases, the rash may persist for weeks. [2]
However, the rash of lupus is inclined to be more persistent. [2] PLE does not increase the risk of lupus. [15] Other similar appearing conditions are solar urticaria, which has a shorter duration, the eczema-like condition, photosensitive dermatitis, [2] and photosensitivity drug reaction. [9]
The rash often appears on the cheeks first and may later spread throughout the face, trunk, arms, and legs. [5] [6] Lesions most often appear on the thighs, buttocks, and trunk. The palms and soles are not affected, likely because the skin in these areas does not have hair follicles. [4] Individual lesions may grow and shrink over hours or days.