About 2 weeks ago I noticed small raised spots developing on the inside of my 22-month old son s left heel. Since then they have grown in size and I can now count four clear raised dots. They feel rough to the touch. They don t seem to be bothering him with walking, but he does like me to rub the area now and then - so I m not sure if it s starting to get itchy. About a month previously, whilst playing outside something bit him in the vicinity of where these dots have now appeared. A big blister appeared which I drained, disinfected and treated. There was never any infection. I would just like to know what these dots could be, if they re going to get bigger and if I should be taking him to see my GP soon.