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.
A trapped nerve can also occur in the arm itself. This can sometimes occur in the wrist (carpal tunnel syndrome) or in the elbow (cubital tunnel syndrome). Pain and tingling in your arm and hand that isn't associated with neck pain may be caused by these conditions.epetitive strain injury may be diagnosed if your arm or elbow pain seems to be caused by a repetitive task and then fades when the task is stopped. It often occurs in people who work with computers or carry out repetitive manual work.