My daughter fell off her bike when she was 8 years old , since then she has had a rock hard lump below her kneecap. Its very painfull to touch no redness or warmth and recently, she has difficulty going up stairs, says her knee feels like it gives out. No pain with ambulation or running. Have tried knee braces, ace wrap, ice, heat, lump never goes away. She is 15 years old at present. Brought it to MD attention with response of getting a hammer to knock it in! Would appreciate a serious answer. Thank you