Inflammation is a response from your immune system in response to an irritant. For example, if you sprain your ankle, your immune system creates a protein called a Circulating Immune Complex (CIC for short). The CIC travels down to the injured ankle and causes pain and swelling.
The pain you feel is to inform you of the injury or damage. And the swelling is protective as it prevents you from moving it and causing more irritation. This is also your body's way of running to the problem with fresh blood, antibodies and vital cells in order to begin healing and repairing the damage.
from: http://www.losethebackpain.com/inflammation5.html
Maybe something hurt it or maybe it is infected
Not much. Braces will hurt because of the shifting of teeth. Your orthodontist may recommend bonjella to bring down the swelling.
Bumps happen when you get hurt. The bump is just swelling.
Ice for swelling heat is for relaxing mussels
due to the collection of excess of fluid below our skin.
its probably a sprain.
They are venomous and the bite causes symptoms such as swelling and itching especially for those who are allergic.
It's going to be the same for the second piercing but on a larger scale, swelling will be worse and you need to be sure you have long barbells for both piercings as both piercings will swell. Does it hurt? Well that's a silly, because it's obvious that with the swelling there will be pain and discomfort.
Does it hurt as well? Because if so, you've won the infection quadrafecta: swelling, redness, pain, and heat (it sounds cooler in Latin: tumor, rugor, dolor, calor).
The root of a tooth that has a bridge over it may in fact hurt. This can be caused by the bridge pushing into the gums, causing swelling and sometimes pain.
Many conditions can cause the knee to hurt when walking even though no swelling is apparent. It could be arthritis, tendinitis or another disorder that should be correctly diagnosed by a doctor.
You probely broke it