I'm noticing these rashes which are linear with small boils, they are increasing day by day despite me not itching or touching them at all. I have 5-6 such rashes on my legs. They are swollen, painful and very itchy and have some black spots in them. They are also very deep red in colour. I consulted a dermatologist for this however she was adamant that this is because I've scratched myself, and gave a TBact cream. But I'm sure that I have not scratched it especially to this extent, I have short nails and I'm very careful, and the rashes are appearing on different spots day by day, one is near the ankle, two on one knee, about 3-4 on another knee and one on inner calf. Does any one know what this is and if I need to be worried?