I got these small little itchy bumps right below my left shoulder which looked like few pimples to me at first and they disappeared after some time. But they reappeared in the form of a cluster and were very itchy. After sometime I got the same cluster below my right shoulder too at same place as the previous one. They go and reappear again. It has been an year now and I get a tendency to scratch it again and again which has darkened the area too. Please help