My 6 year old granddaughter has a golf ball size blackish bruise on her left forearm, it has a normal skin colored center.  It doesnt hurt her and is not swollen.  I has been there for about 2 days.  I dont think it is a spider or insect bite.  I cant see a bite mark in the center.
Hi, I had gone through your question and understand your concerns. You should be worried but not too much.  She may be hurt herself from a bump or fall. It is normal development of bruises healing, usually during 2 to 4 weeks, they often turn colors, including purplish black, reddish blue, or yellowish green. You can apply Tomophobe thrice a day for quick healing. Hope this answers your question. If you have additional questions or follow-up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you and baby good health