What is this elbow lump (pics)?

[thisgirlrides]

I was doing my hair in the mirror today and notice my left elbow has a whacking great big lump on it it looks like a bruise but feels like bone and I have had tennis elbow in the past so could assume it's related but should/can I do anything about it?

Has it been there long?

As with any lump it's always advised to go see your GP. I had a similar sized lump in exactly the same position funnily enough. It was deemed harmless by the GP and years later I had it removed for cosmetic reasons. Mine was a hidradenoma. Yours might be that, might be something else. If it doesn't disappear in a couple of days, get yourself a doctor's appointment.