DD is 9.
3 days ago this lump, raised, hard and with bruising, appeared on her inner forearm. It hurts if it touches anything much. I think it is where a molloscum used to be, though that resolved a few weeks back. It doesn't seem to be going away (though may be looking slightly more bruised, and slightly flatter than it was), and has been there 3-4 days now. Is it something I need to worry about/get seen? Many thanks in advance.