I'm beginning to develop small, red itchy bumps on my calfs and arms. Nothing on my back or face. I checked my bed for bed bugs... no bugs. I get them in series. When one set (about 10-15) heals, another attack happens and Im left with black scars on my legs. I looks as if I have chicken-pox scars. I do not have any pets, and have a super clean home. I've washed my bed clothes, use Bactine spray, and an itch ointment. What could this be? Please help because the itching is unbearable all day. This began about 2 weeks ago.