I am a 53 year old male with a abnormal bruise on my lower arm. It came on spontaneously over a period of thirty minutes. It measures approximately five inches by two inches, is dark in color with white splotches. It itches slightly, but I cannot find an insect bite. Should I be concerned?
Kindly get your self checked by a dermatologist. As certain spontaneous things are never of a worry. But there is no harm in taking their advice. Certain ointment or certain proper caring may help you get ease but meeting a dermatologist unperson will be of great help to your situation.