Answer:
If you have had a fall or hit your arm you might feel or hear a snap or a cracking sound.
The main symptom is pain, which will be worse if you try to move your arm. A broken upper arm (fractured humerus) can be extremely painful, so much so that you may feel sick, dizzy or faint.
Other symptoms of a broken upper arm are:
You will be unable to use your arm.
Your elbow or upper arm may be swollen.
Your elbow or upper arm may bruise.
If it is a very severe break, your arm may be a different shape.
You may notice tingling or numbness.
There may be bleeding if the broken bone (or your fall) has damaged the skin.
Explanation: