How do you know if you have a concussion?

I fainted 12 hours ago. I don't know how it happened, how I fell or how i landed, but the back of my head really hurts. After I fainted and woke up I couldn't stay awake. I was really sleepy. My head still kinda hurts 12 hours later. Do i have a concussion? No other symptoms

I hit my head 10 days ago, it gives me headache and dizziness for a week, now the headache is gone but still dizzy.

I fell a week ago whilst stumbling to avoid my cat. The left side of my face hit a bookcase.....hard. The bruising is bad, but I discovered a kind of pulpy, discolored knot about 2 inches above my left temple. I am functioning, but still feel somewhat bad.

I was in a car accident and i hit my head. The impact caused a minor cut in my scalp with bleeding. It has been two days and my headaches are the same and if not worse. I also feel fatigue, am sensitive to light and noise, and sometimes throughtout the day I feel dizzy or as if im not mentally available. I was wondering if i should get checked out ?

Concussion*

Hi Anon,

Thanks for your question and welcome to EmpowHer! I am sorry to hear about your injury and hope you recover quickly. The symptoms of a concussion include headache, loss of consciousness at the time of injury, memory loss, dizziness, drowsiness, balance problems, sensitivity to light and nausea or vomiting. You may also be slow to respond to stimuli.

Concussions can cause swelling in the brain, brain injury and death. However, most concussions do not cause major injuries. You may have developed post-concussion syndrome, which is characterized by headaches and dizziness that lasts for weeks after injury. Most post-concussion syndrome symptoms clear up in less than 10 days, but it can persist for up to a year in extreme cases. If you suspect that you may have suffered a concussion, or have developed post-concussion syndrome, please visit the doctor immediately.

We want to know that you're ok. Please check back and let us know how you are doing.

Warm Wishes,

Shanon