Photo 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.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.
There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Various causes of drowsiness or sleepiness include: 2  Sleep debt. 3  Not getting enough sleep. 4  Shift work. 5  Jet lag. 6  Boredom. 7  Fatigue-see various causes of fatigue. 8  Sleepiness-see various causes of sleepiness.
Other causes of sleep disturbance include sleep apnea, teeth grinding, allergies and colds, snoring, frequent urination, fibromyalgia, and nightmares. Sleep apnea causes breathing interruptions during your sleep, and teeth grinding (which is called bruxism) can cause you to wake up during the night.Allergies, colds, coughing, and upper respiratory infections can make it difficult for you to breathe at night.leep apnea causes breathing interruptions during your sleep, and teeth grinding (which is called bruxism) can cause you to wake up during the night.