Thank you for contacting Healthcare magic.
First of all, I wish to reassure you that your symptoms do not suggest any serious internal brain injury
Your symptoms are suggestive of scalp hematoma
(bleeding under the skin). It would gradually resolve on its own, however, it may take 10-14 days for complete healing.
If it is painful, you may take analgesics such as ibuprofen
As of now, there is no need to go to a doctor.
Wishing you good health,
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist