Thanks for posting your query.
Do you have any other symptoms apart from crunching sound in neck?
Neck and its neurological contents are so sensitive that if you got some sort of injury in neck then there is high possibilities of pain & weakness in lower limbs, unconsciousness
, difficulty in respiration & effect on cardiovascular system (respiratory & cardiac center in medulla of brain).
formation may occur due to soft tissue injury
Bruise and hematoma may require 10-14 days for recovery.
There may also be possibility of muscle sprain and require muscle relaxants.
You should consult with internal medicine specialist/ orthopedic surgeon and should go for x ray cervical spine
You should apply thrombophob ointment for faster recovery of hematoma on forehead.
Dr. Mayank Bhargava