Thanks for providing more information.
Well as you have bump on head so you should apply cool compresses with ice wrapped in towel on it.
As you have associated bruise so Tetanus toxoid shot should be updated if you have not received since last 5 years.
Proper dressing should be done to prevent any infection at the site of bruise.
You can take only OTC acetaminophen, for headache.
Avoid to take aspirin, ibuprofen, or other anti-inflammatory medications.
As such the symptoms of a head injury can occur immediately or develop slowly over several hours.
So, as with anyone with a head injury, closely watch for 24 hours after the incident.
You need to keep watch on any associated symptoms like nausea, vomiting, dizziness, disorientation, restlessness, blurred vision, irritability then visit ER ASAP.
Otherwise make an appointment with your doctor for further evaluation and management today.
I hope this helps.
If you have any further query then feel free to ask.
Positive feedback and bonus are highly appreciated.