Hi, i had a lump in the crease of my inner elbow i pressed down on it a few times and now seems to have gone i am worried i looked up and it said olecranon bursitis? could this be right but it's gone now?

Olecrenon Bursitis is known as Popeye's elbows after the cartoon character's prominent bulge on his elbows. That is on the outside of the elbow. Inside the crease is a different matter as their are tendons, nerves, muscles, vessels running in the crease known as the antecubital fossa. A common swelling in that area is a cyst or muscle hernia. I recommend you get it examined. Ultrasounds helps.