 [ Symptoms ] how do you know a purple spot is cancer  the spot is lightly raised and is on the inside of my right forearm i also have a spot raised that appeared on the forehead but looks like a blister it is getting dryish but still raised my brother had melanoma my grandmother had a type of stomach cancer and my dad had some type of cancer but not sure what kind  [ Disease ] hi this sever anemia you will need iron supplements for almost 6 month may be more with rechecking your cbc every 3 month effect can appear after one month but this does not mean problem is fixed good luck