I have been noticing that my sternum has been aching - I assumed it wasn’t anything serious - in the past, when I have had a chest infection, it has irritated ny sternum and made it sore.
But tonight, when I was rubbing it to ease the ache, I noticed that there is a hard lump at the bottom end of my sternum - round, hard, sore and about the size of a half golf ball.
I will get an appointment with the gp as soon as I can, but I am freaking out a bit.