Deathwatch beetle. Deathwatch beetle (Xestobium rufovillosum), an anobiid, or borer insect, of the family Anobiidae (insect order Coleoptera) that makes a ticking or clicking sound by bumping its head or jaws against the sides of the tunnels as it bores in old furniture and wood.
1 Superior vena cava syndrome is most often caused by compression of the vein (the superior vena cava), that returns blood from the upper body back to the right atrium of the heart by tumor.  Symptoms include swelling of the face and arms associated with shortness of breath.
If you believe you may be experiencing canal stenosis or a similar issue, speak with a spine professional immediately. Canal Stenosis Symptoms. The symptoms of spinal stenosis vary widely depending on the location of the canal narrowing and the severity of the condition. However, some of the most frequently occurring symptoms are: