urticaria
Allergic skin welts
Urticaria is the medical term for hives—an outbreak of swollen, itchy welts on the skin, typically from an allergic reaction.
The rash appears suddenly and may vanish within hours, though chronic cases persist for weeks.
The doctor diagnosed her urticaria as a reaction to shellfish.
Raised skin from impact
- whealsRaised skin irritations
- angioedemaSudden deep tissue swelling
- pruritusMedical term for itching
- flare-upSudden recurrence of symptoms
histamine · chronic · acute · autoimmune · erythema · papule
Irritating skin sensation
- rednessCrimson-hued state
- burningCombustion in progress
- stingingCausing sharp pain
- swellingAbnormal tissue enlargement
tingling · irritation · discomfort · inflammation · scratch · flaring · blanching · warmth
Immune response trigger
- sensitizationIncreased responsiveness to stimuli
- hypersensitivityExaggerated response to stimuli
- food allergyAdverse immune response to ingestion
- drug reactionBody's response to medication
pollen · dust mites · pet dander · latex · shellfish · peanuts · penicillin · sulfa
Drug blocking allergic response
- corticosteroidsInflammation-suppressing steroid medications
- epinephrineAdrenal stress hormone
- immunotherapyDisease treatment via body's defenses
- cetirizineSecond-generation antihistamine drug
loratadine · diphenhydramine · calamine · oatmeal bath · desensitization · cyclosporine · prednisone · hydroxyzine
Dangerous systemic allergic reaction
- epinephrineAdrenal stress hormone
- adrenalineEmergency response hormone
- bronchospasmInvoluntary narrowing of airways
- throat swellingEnlarged tissue in neck
breathing difficulty · blood pressure drop · EpiPen · emergency · airway obstruction · hospitalization · life-threatening
welts
Raised skin from impact
- whealsRaised skin irritations
- angioedemaSudden deep tissue swelling
- pruritusMedical term for itching
flare-up · histamine · chronic · acute · autoimmune · erythema · papule
itching
Irritating skin sensation
swelling · tingling · irritation · discomfort · inflammation · scratch · flaring · blanching · warmth · tenderness
allergen
Immune response trigger
- sensitizationIncreased responsiveness to stimuli
- hypersensitivityExaggerated response to stimuli
- food allergyAdverse immune response to ingestion
drug reaction · pollen · dust mites · pet dander · latex · shellfish · peanuts · penicillin · sulfa · aspirin
antihistamine
Drug blocking allergic response
- corticosteroidsInflammation-suppressing steroid medications
- epinephrineAdrenal stress hormone
- immunotherapyDisease treatment via body's defenses
cetirizine · loratadine · diphenhydramine · calamine · oatmeal bath · desensitization · cyclosporine · prednisone · hydroxyzine · topical steroids
anaphylactic shock
Dangerous systemic allergic reaction
- epinephrineAdrenal stress hormone
- adrenalineEmergency response hormone
- bronchospasmInvoluntary narrowing of airways
throat swelling · breathing difficulty · blood pressure drop · EpiPen · emergency · airway obstruction · hospitalization · life-threatening