Viruses like EBV, CMV, Hepatitis B virus, coxsackievirus, parainfluenza virus, Respiratory syncytial virus, rota virus, adenovirus, poliao virus, parvovirus, HIV, hepatitis A and C virus along with some bacteria like Mycoplasma Pnumonia, group A streptococcus cause an immune response to transient viremia (immune complex deposition). Usually occurs in children aged 6 months to 12 year old.
Initially there is mild, nonspecific, upper respiratory infection.
Discrete, non-itchy, red, papules appearing over buttocks, face, arms and legs. Trunk is not involved.
Duration is almost 2-8 weeks.
The condition is self limiting.

Initially there is mild, nonspecific, upper respiratory infection.
Discrete, non-itchy, red, papules appearing over buttocks, face, arms and legs. Trunk is not involved.
Duration is almost 2-8 weeks.
The condition is self limiting.