i have no idea...lol he might wanna go see a doctor though

Hi Jenrose

Has your boyfriend seen a doctor about this, It sounds very painful ..
I'll re-post your query in the Orthopedics Forum so you can get the advise and support your boyfriend needs.

Wishing you both well -

Ginger

Just had mine drained. Full of blood, feels as you described because the amount of pressure makes it difficult to tell if it is fluid or a mass.

Bursitis was the diagnosis, but blood is being analyzed because of Cancer in my family.

What nut would walk around with an elbow with a sack of fluid above his elbow the size of an egg and not think a physician should look at it.

Maybe you ought to have the sack on the top of his neck checked as well.