The conversation between human and AI assistant.
[|Human|] My 9 year daughter hit her thigh on a picnic table in late August. It left a HUGE bruise.  It has not been over a month and the bruise is healed but her leg has a large lump and indent from where the bruise initially was.  Is this something I should worry about?
[|AI|]  Hello and welcome to Chat Doctor, A blunt trauma is usually followed by a bruise or hematoma formation. Hematoma is formed due to accumulation of blood from blunt trauma to the thigh. A hematoma changes its color and resolves over a period of time. However, the resolution is complete over a couple of days. If the hematoma is persisting after many days, you need to consult your primary healthcare provider for the clinical assessment of the lump. The lump could be due to hematoma, or it may not be related to hematoma. Imaging studies -ultrasonography or CT scan of the thigh may be required to know the exact site of lesion. Thanks and take care Chat Doctor. 
