erythema
Dermal redness condition
Erythema is redness of the skin caused by increased blood flow to surface capillaries—the flush of irritation, inflammation, or injury.
It appears in sunburn, rashes, allergic reactions, and infections.
Medical terminology often specifies the cause: erythema migrans is the expanding red ring characteristic of Lyme disease.
UV-induced skin inflammation
- radiationEnergy propagation through space
- infectionPathogen invasion causing illness
- traumaLasting psychological wound
- chemical burnDamage from corrosive substances
heat exposure · friction · drug-induced · photosensitivity · UV exposure · scalding · frostbite · irritant
Heedless or skin irritation
- dermatitisInflammation of the skin
- eczemaInflammatory skin disorder
- psoriasisImmune system attacks skin cells
- urticariaRaised itchy skin welts
rosacea · macule · papule · erysipelas · cellulitis · impetigo · wheal · petechiae
Abnormal tissue enlargement
- rednessCrimson-hued state
- warmthHeat you feel
- tendernessGentle, caring quality
- immune responseBody fighting foreign threats
cytokines · vasodilation · capillary · hyperemia · inflammatory · prostaglandins · histamine · leukocytes
Exaggerated response to stimuli
- urticariaRaised itchy skin welts
- hivesRaised itchy skin reaction
- anaphylaxisSevere systemic allergic reaction
- angioedemaSudden deep tissue swelling
wheal · flare · histamine · allergen · contact dermatitis · drug reaction · sensitization · pruritus
sunburn
UV-induced skin inflammation
- radiationEnergy propagation through space
- infectionPathogen invasion causing illness
- traumaLasting psychological wound
chemical burn · heat exposure · friction · drug-induced · photosensitivity · UV exposure · scalding · frostbite · irritant
rash
Heedless or skin irritation
- dermatitisInflammation of the skin
- eczemaInflammatory skin disorder
- psoriasisImmune system attacks skin cells
urticaria · rosacea · macule · papule · erysipelas · cellulitis · impetigo · wheal · petechiae · purpura
swelling
Abnormal tissue enlargement
- rednessCrimson-hued state
- warmthHeat you feel
- tendernessGentle, caring quality
immune response · cytokines · vasodilation · capillary · hyperemia · inflammatory · prostaglandins · histamine · leukocytes · edema
hypersensitivity
Exaggerated response to stimuli
- urticariaRaised itchy skin welts
- hivesRaised itchy skin reaction
- anaphylaxisSevere systemic allergic reaction
angioedema · wheal · flare · histamine · allergen · contact dermatitis · drug reaction · sensitization · pruritus · itching
redness
Crimson-hued state
diffuse · mottled · patchy · confluent · circumscribed · spreading · raised · flat · discoloration · blotchy
- inflammationacute inflammation, chronic inflammation, pain, heat, swelling
- medical signsmurmur, edema, jaundice, cyanosis, pallor
- skin irritationredness, chafing, stinging, irritation, rash
- skin rashesrash, eruption, rashes, spots, red spots
- Skin Findingslesion, macule, papule, pustule, vesicle
- tissue reactionsinflammation, swelling, redness, pain, scarring