Allergies are a common cause of hives since an allergic reaction can trigger the immune system response that results in trapped fluid beneath the skin.An allergic reaction can occur due to something you ingested or were exposed to through the air.hoto Credit pollen image by asb from Fotolia.com. Allergies are a common cause of hives since an allergic reaction can trigger the immune system response that results in trapped fluid beneath the skin. An allergic reaction can occur due to something you ingested or were exposed to through the air.
The median nerve, which runs through the arm and hand, can cause swelling pain and numbness if injured. Ulnar nerve injury Damage to the ulnar nerve causes swelling, pain and numbness in the forearm, hand, and ring and little fingers.
How to Deal With It. When hands fall asleep while sleeping, you can use the following remedies: 1  Take a tablespoon of linseed oil before sleeping. 2  Take ginger tea to boost circulation. 3  Fill your bathroom sink with water and ice cubes and then dip your hands.  Eliminate acidic drinks and salt from your diet.