I was hit very hard by a line drive softball on the inside or my leg right above ankle.since then there has been lots swelling and a hard knot there.

Hematoma with calciu: Probably had some bleeding around the bone, even a tiny crack, that is now calcifying, meaning it is depositing calcium like new bone. Might take months to go away.

Contusion/hematoma: Most likely a contusion of the bone or a hematoma or both. If unable to ambulate seek evaluation with imaging. Hopefully you have iced it, taken anti-inflammatories. If improving over a few days then good. If not improving then seek evaluation also.

Trauma: Its likely you have a large amount of muscle swelling or even a small blood collection. This is ok - rest and elevate your leg and place a cold pack on the area. It may take some days for the pain to heal. Reasons to see a doctor are an inability to walk or severe unrelenting pain. It should get better :)

Hematoma: The injury was a contusion and the swelling most likely indicated bleeding with the firm lump being a congealed clot of blood. If there is no further evidence of active bleeding, warm applications help to dissolve the blood clot. If a very hard lump persists and is painful, an incision and removal of it can be performed.

RICE: RICE is an acronym for the best treatment for injured ankles. It states for Rest Ice Compression Elevation Avoid weight bearing on the injured ankle as much as possible. Apply ice packs for 15-20 minutes every 2-3 hours. Snugly wear the ankle with an ace bandage. MOST IMPORTANTLY, Keep ankle elevated above the level of your heart as much as possible

Hematoma: probably. A hematoma is a collection of blood that can form at the site of a trauma. This will eventually go away. The first aid for this is RICE. Rest the leg, Ice the swelling 20 min at a time, Compress the swelling with an ACE (compression) bandage Elevate your leg when possible (lie on couch with leg elevated on a pillow).If it's not getting better or hurts to put wt on your leg, see your MD

Softball Turned Hard: yeah, that's an area of thin skin and the bone is near the surface. you probably have a bone bruise and maybe even a "subperiostial hematoma" which just means it hurts and will take a while to go away. the effect of gravity will also work against you so elevating it a few times a day will help. topical ice may help,plus tylenol (acetaminophen) or motrin or both. if getting worse in any way, get it checked out