What are the consequences of avm on left leg and around scrotum?

Depends on size. Congenital av malformations in the extremity often result on that extremity growing longer than the other.Depending on size an degree of shunting, may remain indolent or in some instances, skin erosion, bleeding can occur. If avm large, can cause tachycardia.
Swelling and pain. Many possibilities with pain and swelling being the commonest symptoms.