Arms and Legs Red Non Scaly

Red nonscaly lesions on the arms and legs.

Red nonscaly rashes on the arms and legs are usually one of the reactive erythemas eg Urticaria,drug reaction,vasculitis or viral exanthems and if hot and tender cellulits. Conditions such as the annular erythemas, erythema multiforme and toxic erythema are not uncommon..Insect bite reactions with papular urticaria occur on these exposed areas and so do many of the photo diseases eg polymorphous light eruption and subacute lupus erythematosus. Atopic dermatitis, erythrodermic psoriasis, Pityriasis rubra pilara can all present as a generalised erythema. Toxic erythema with skin tenderness should make you think of Staph scalded skin syndrome, Toxic epidermal necrolysis, toxic shock syndrome and Dengue fever. The lymphomas, lymphocytic leukaemia and the Sezary variant of T cell lymphoma of the skin again may present with a generalised erythema. Erythema on the dorsal elbows and knees is part of dermatomyositis.

Other conditions simulating cellulitis    Diseases that
commonly masquerade as this condition include thrombophlebitis, contact
dermatitis, insect stings, drug reactions, eosinophilic cellulitis (the
Wells syndrome), gouty arthritis, carcinoma erysipelatoides, familial
Mediterranean fever, and foreign-body reactions. Diseases that uncommonly
masquerade as infectious cellulitis include urticaria, lymphedema, lupus
erythematosus, sarcoidosis, lymphoma, leukemia, Paget disease, and panniculitis.

SIGN DIP MEN    Overview of Red Nonscaly Diseases

 

S-Squamous   

 

I-Infective    Measles,Scarlet fever,Rubella,Infectious mononucleosis,Toxic shock syndrome,Staph scalded skin syndrome,Syphilis,HIV exanthem,Typhoid fever,Typhus

 

G-Granulomatous   Sarcoidosis

 

N-Neoplastic   Sezary syndrome,Flushing disorders such as Carcinoid syndrome or Phaeochromocytoma,Urticaria pigmentosum,Leukaemia and Lymphoma

 

D-Drugs    Any drug reaction,Mercury exanthem

 

I-Immunological    Toxic epidermal necrolysis, Systemic lupus erythematosus,

 

P-Physical     Sunburn

 

M-Metabolic

 

E-Endocrine

 

N-Nutritional