Chickenpox with another name, Varicella is a viral infection. Chickenpox is caused by varicella-zoster virus. A person hasn't been infected or vaccinated can get the disease. It's highly contagious but generally a non-serious and self-limiting infection, but it can be serious in case of babies, adults and people with weak immune system.
Chickenpox affects more commonly children between 5-10 years of age. This disease is characterized by itchy skin rash. It usually start appearing first on the chest, back and face then spreads to the rest of the body causing between 250 and 500 itchy blisters.
Chicken Pox in Ayurveda is known by name of "Laghu Masurika".