It really depends on what kind of swelling we are talking about if it is something like your arm maybe you could be sleeping on it in a bad position ? otherwise, well i guess just reply with where the swelling is maybe i can help ya out :)
causes by our sweat glands.
Pressure on the side you sleep on. Arthritis. Old age. Overweight.
Arthritis causes pain, stiffness and swelling of joints.
Fever, loss of appetite, aches, headaches, and swelling around the ears. in males swelling can be in one or both testicles. and causes pain and discomfort while occurring.
Dehydration
your body holds in water and alot of it. that's why you should drink alot of watyer while pregnant because it flushes the other water out.
it happens when we can't move air freely through our nose and mouth during sleeping
During the night, your throat can get dry due to breathing while asleep. Especially if you breathe through your mouth while sleeping.
encephalitis.
allergic reaction
There are a number of causes for minor swelling and twitching of lips. In most cases, this is associated with stress or certain allergies.
The causes of ankle swelling at age 53 can be spraining, arthritis, osteoporosis, blood issues, and reaction to coldness.