Hello. Thanks for using this forum. Any changes in the shape and size of the mole, with any changes in color of the mole should be taken seriously. Most of the people mistake such changes for a bruise
. You should consult as soon as you can with your doctor who can take a close look at this and check whether this its really a bruise or any further investigations are required. Usually the doctor can order for a skin biopsy
which means small part of the skin will be removed to be sent for laboratory investigation. Advise is to consult your doctor. If you have further questions feel free to ask. Regards.