Chilblains

• Chilblains (CKS), Perniosis - syn. chilblains (PCDS)

Drug Rashes

• Drug rashes - an overview (PCDS)

Erythema multiforme

• Erythema multiforme (PCDS)

Erythema nodosum

• Painful red lesions on the front of the shins, sometimes thighs and arms commonly associated with many conditions including Crohn's disease and ulcerative colitis.

• F>M. Idiopathic (1/3), Infective (Strep, TB, atypical mycobacterial, Yersinia, GI infections, Mycoplasma, leprosy), sarcoid, pregnancy, oral contraceptive pill, medications (penicillins, sulphonamides, hepatitis B vaccine, isotretinoin, SSRI), rheumatological and autoimmune conditions, inflammatory bowel disease (UC or Crohn's disease): Erythema nodosum (PCDS)

Granuloma annulare

• Granuloma annulare (PCDS)

Insect bites/stings

• Insect bites and stings (CKS)

Intertrigo

• Intertrigo (PCDS)

Panniculitis

• Panniculitis (PCDS)

Urticaria & Angioedema

• Refer people to a specialist drug allergy service if they have a suspected allergy to local anaesthetics and they need a procedure involving a local anaesthetic. Only severe NSAID allergies require referral, while well-recognised adverse reactions (e.g. glandular fever rash) don't require further investigation

• Urticarial reaction suggests an IgE-mediated food allergy and specific IgE antibody testing is appropriate. IgG antibody testing should not be used.

Resources

• Drug Allergy: diagnosis and management (NICE CG 183, 2014)

• Urticaria and angioedema - an overview (PCDS)​, Urticaria (CKS)