Finger Lumps & Swellings
Swellings in the fingers are quite common. They are rarely serious or significant. The commonest causes are fluid filled cysts called ganglions , proliferation of the covering of the tendons (called benign synovioma, or giant cell tumour of the tendon sheath), or nodules of Dupuytrens Disease. There are other, much rarer, causes which your doctor will explain.
Although many of these swellings feel as hard as bone, they are usually not made of bone. Occasionally, bony swellings will be seen in the fingers, such as at the base of the fingernails in arthritis (called Heberden's nodes), or around the back of the knuckles (arthritic osteophytes).
The majority of finger lumps and swellings need no treatment other than diagnosis. If a swelling is of sufficient size to interfere with movement of the finger, then your surgeon may offer to excise that swelling. There is always the risk that many of these swellings could grow again, so surgery should be reserved for those people who would clearly benefit from it.