Hi, I have had this strange misshapen mark on one of my upper arms since around the age of 11 or 12. I definitely didn't have it when younger (so presume I can discount any kind of birthmark). It is not that clear on the pics, but is pale brown, has a slightly rough, bumpy texture and will go redder if in a hot bath/shower or sometimes alcohol will do this too. I try to keep it covered or cover it with sunscreen. No one seems to know what it is. Help - I'm now in my 40s! PS I've have fake tan on here to help blend it in but I think the irregular shape and also the strange "texture" on my skin can be seen. Any help very much appreciated. PS I am new so please be kind
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