5yr old daughter has a hard painless lump on the back of her hand?

Painless lump, hand: You can think of many benign tumors like ganglion cyst, sebaceous cyst, lipoma, etc.Dx depends on when seen by md and if biopsy is needed.

Most likely benign: The majority of painless lumps on the back of the hand are usually benign. One possibility is a ganglion cyst might have formed. No matter the etiology of the painless lump this should be evaluated by a physician to determine the location of the lump. Some benign masses on the hand may cause weakness or limitations of the joint.