Hi i have black patch ring which is growing can you help me what is it?

Hard to tell ...: Without seeing your rash or lesion it is hard to tell what it is. A growing ring that is *not* black makes me think of ringwork, a fungal infection called tinea. Black only makes me visualize a black and blue spot, called ecchymosis, where there was bleeding under the skin. As they heal they can look like a ring. I'd have to suggest you go to a doctor who can talk with you and see the ring.