Hello, Thank you for asking at HCM. I read your question carefully and understand your concern. If you had itchy mosquito bites the are around might have been traumatized a little and this might cause the bruises. if you have no pain at the areas, the lumps are getting better and no fever and do not feel unwell it is wise to just watch the lesions. If they become itchy apply local cold and continue to get benadryl to help and gently apply local steroid cream. If no improvement in a few days or you get more bruises or get any worse please speak with your provider for appropriate evaluation and treatment. Hope this is helpful to you and answers to your question.