Hi, thanks for using Healthcaremagic.
I went through your query and understood your concerns.
Your symptoms are in favour of hematoma which is not resolving. During trauma to head blood would have collected beneath the skin, in many cases it slowly resolves over 2 to 3 months and swelling disappears. In few patients calcium deposition takes place resulting in hard mass which doesn't resolve. Which needs to be removed surgically by giving local anaesthesia.
Hope I answered your query. Feel free to ask further related query.
Wish you a good health.
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