Hi, thanks for asking from HCM.
I can understand your concern. The headache, bruise and swelling usually subside in 10-14 days. However sometimes post traumatic headache may persist for years. It usually presents as dull aching ache with episodes if
severe pain, pain at injury site, related to stress/exertion, not associated with vomiting, may cause aggressiveness/poor memory/confusion/
restlessness.
Even any type of headache can radiate to injury site because of scarring and
hypersensitivity in that area.
Post-traumatic headache usually occurs after severe
head injury or injury with fracture.
If your symptoms are matching with it, it could be the cause.
Regarding bruising, it might be hyper-pigmentation at injury site. It is usually "brownish" colour and persist for years. It gradually fades away. You can check it noticing its colour. If it flares up intermittently, it could be due to some collection which is getting infected.
I am suspecting it as CT head was normal.
But if it is red/blue, better
consult doctor. He will examine you and prescribe CT head to know about injury site, any collection below it.
If there will be any collection, it can be treated by
: Observation only if small in size/no infection/you are getting relief with treatment.
: Surgical evacuation if infected/no decrease in size/large in size/underlying bone eroded.
As you have already mentioned, you are not feeling any abnormality in size of forehead, it is less likely to be collection.
At home, you can take tablet
Diclofenac sodium after proper prescription.
Hope it will help you. Thanks, take care.