several sores on legs begins with itching, swelling and 2 holes 1/16" apart..couple of days later leaves holes in skin with hard painful centers. had this about 8 weeks now. if the areas heal they leave purplish hard scars? tried antifungal creams, bleach, keflex, and vinegar. this came about after exposure( i feel ) to poison sumac. doesnt take the typical pattern for ringworms. havent been outside state of tennessee this year.