Infection on right leg! Problem?

A week ago I was feeling itchy on my right leg, just scratched my leg to my jeans and in sometime I noticed that a small portion of skin-out had happened and from next day some liquid started coming out of that skin-out region. And in next 2 days small watery boils started forming on all the region where that liquid discharge had spread earlier. Now those small boils have increased and also turning black.. this type of infection happens to me usually in cold seasons and then disappears and again comes back during cold season. Kindly look at the pictures and assess it. And it is really itchy and I always get the urge to scratch it.. whenever I touch that region, water comes out of those boils. Is this a worrying problem?