Erythema (from the Greek erythros, which means "redness") is skin or mucous membrane redness induced by hyperemia (increased blood flow) in superficial capillaries. It can occur as a result of any skin damage, infection, or inflammation. Nervous blushes are an example of erythema that is not related to any disease.

1. ERYTHEMA
(redness of skin)

2. Erythema (from the Greek erythros, which means "redness")
is skin or mucous membrane redness induced by hyperemia
(increased blood flow) in superficial capillaries. It can occur as
a result of any skin damage, infection, or inflammation.
Nervous blushes are an example of erythema that is not
related to any disease.

3. Erythema toxicium
•Rash in newborn
•Appears Within 1st wk. of life.
•Improves within 1-2 wks.
•Blotchy Red spots.
•Overlying firm, yellow-white bumps or pus-filled boils.
•Any where on body
•Not harmful
•No associated illness
•No Treatment required.

5. Erythema Nodosum.
•Inflammation of fat cells under the skin.
•Tender Red Nodules / lumps.
•Seen on both shins.
•Resolve spontaneously within 30 days.
•Common in people 12-20yr of -age.
•Associated with HLA-B27

6. Etiology
30-50% idiopathic.
Infections,
 Streptococcal infection.
 Tuberculosis
 Mycoplasma pneumoniae
 Histoplasma
 Yersinia
 EBV.
 Leprosy
 Valley fever
 Cat- Scratch disease
Autoimmune: IBD, Bechet disease, Sarcoidosis
Medications: Sulfonamides, OCP, Penicillin., Hep B vaccine.
Malignancies: NHL, Carcinoid tumors, Pancreatic cancer.

8. Erythema Multiform.
•Deposition of immune complexes in Microvasculature of Skin.
•Multiforme = lesion of multiple forms
•“Target lesion” is typical manifestation.
•SJS (steven Johnson syndrome) and TEN (Toxic epidermal necrolysis) Part of
multiforme spectrum.
•Itchy, Pink Red blotches
•symmetrically arranges.
•Starting from extremities.
•Target lesion appearance.
•Pink, Red area around pale center.
•Resolution in 7-10 days.

9. Etiology HSV Mycoplasma Trichomonas
Toxoplasma. Antibiotics
Anti-
convulsant
Aspirin
Allopurinol.
BCG
vaccination
N.
Meningitidis
Streptococci
Pneumococci
Salmonella chlamydia
Collagen
disease.

11. Erythema Migran
•Lyme disease
•Tick associated disease / illness.
•Characteristic Bull’s eye Appearance
•Often near skin folds, Armpit/groin/ back of knee.
•Rash appear 3-32 days after bite.
•2-3cm / day expand.
•Diameter 5-70cm.
•Circular/ oval
•Reddish Blue.
•Not itchy or tender.
•4 wks. to resolve.
•Viral like illness.

13. Erythema Elevatum diutinum
Form of vasculitis para-neoplastic syndrome

14. Erythema
gyratum
• Round/arc shape.
• Lung Carcinoma

15. Erythema Marginatum
•Pink Rings on Torso and inner surface of limbs
•On extensor surfaces
•Hereditary angioedema
• Barely Raised
• non-itchy.
•Face is spared.

16. ASSOCIATED DISEASES
 Rheumatic fever
 Myocarditis
 Allergic drug reaction
 sepsis
 Glomerulonephritis

17. Erythema Infectiosum (5th disease)
•Parvo virus B-19.
•Slapped cheeks
•lacy Rash on body
•Remember Hydrops fetalis and sickle cell disease(when the
disease occurs in pregnant women, complications such as
aplastic crisis or hydrops fetalis become real concerns)

18. • commonly seen in
children between five
and fifteen years old,
especially in the
spring and summer
months
• Route of
transmission is
primarily via
droplets from
respiratory
secretions, although
it can be spread
hematogenously.

19. Erythema induratum
•Panniculitis on calves in women
•cutaneous T. B.
•Poor arterial supply,
•Thick subcutaneous fat,
•Temperature Change with change in External pressure.

21. Erythema ab-
igne (EAL)
Hot water
bottle Rash.

22. keratolytic winter
Erythema
•Autosomal
dominance
•redness & peeling
of skin on palms
and sole.