Hello, 

my son is 16 and has a bump on the skin on his forearm. I first noticed it over a year ago. We think it may have started as a bite or an inflamed keratosis Polaris but can't be sure. 
initially it was a firm nodule about 3mm and was skin coloured with a slightly darker ring 
As it didn't go away, I took him to the GP in January. She said it might be a mole and to just keep an eye on it. 
Last weekend I noticed it has turned pink and seems more raised. It blanches when I put pressure on it. My son hadn't noticed the change. 
I had a telephone consultation with another GP who asked for photos. She said it looks like a dermatofibroma and has sent the photos to dermatology. 
I've looked up dermatofibroma and it does look like that but it doesn't dimple when pinched like a dermatofibroma should. 
I'm just so worried as my mum had melanoma many years ago and passed away from lung cancer and I have  suffered with health anxiety ever since. 
I really don't want to pass on my anxiety to my son so am trying to not keep looking at and touching it. 
im just so worried it could be a melanoma. 
Thank you for reading. 
Sara