I have been having this rash for over 10 yrs. The start like a bee sting and starts to itch from there. After it swells it has a small blister,after that it become hard and black. They come in clusters and I have them under my neck,under my arms and my inner thigh. Please help I'm starting to see the same small bumps on my daughter,l don't know if its genetic or in our blood stream.
