Is erythema modusom contagious?and what causes it?

You mean:








Erythema Nodosum


What is erythema nodosum?


Erythema nodosum is characterized by tender, red bumps, usually found on the shins. Quite often, erythema nodosum is not a separate disease, but, rather, a sign of some other disease, or of a sensitivity to a drug.





Diseases that can cause erythema nodosum:





streptococcal infections


sarcoidosis (inflammation of the lymph nodes and other organs)


leprosy


coccidioidomycosis (infection of the upper respiratory tract and lungs)


histoplasmosis (an infectious pulmonary disease)


tuberculosis


psittacosis (a flu-like disease)


lymphogranuloma venereum (a venereal infection)


ulcerative colitis


Drugs that can cause erythema nodosum:





antibiotics containing sulfa


bromides


idodides


oral contraceptives


What are the symptoms of erythema nodosum?


The following are the most common symptoms of erythema nodosum. However, each individual may experience symptoms differently:





raised bruises on shins


fever


joint pain


enlarged lymph nodes in chest


Young adults are particularly susceptible to erythema nodosum -- the symptoms of which may resemble other dermatologic conditions. Consult a physician for diagnosis.





How is erythema nodosum diagnosed?


A biopsy (removal of tissue for examination under a microscope) of a bump can usually confirm the diagnosis. However, the exact cause can not always be identified. Drug-caused erythema nodosum can usually be diagnosed by careful elimination of the drug causing it.





Treatment for erythema nodosum:


Specific treatment for erythema nodosum will be determined by your physician based on the cause of the disorder and may include:





antibiotics


treatment of underlying cause


bed rest to relieve pain


aspirin


corticosteroids

Is erythema modusom contagious?and what causes it?
It isn't a disease, it is a symptom. You won't spread it, but if you have an infection that is causing it, it is possible, but there are so many things that cause it, you should see a doctor asap.