Some causes of tinnitus are less common, including: 1  Meniere's disease. 2  TMJ disorders. 3  Head injuries or neck injuries.  Acoustic neuroma.
Jumping spiders do sometimes bite, but their venom is not considered to be dangerous (unless youâre allergic to spider bites). They are sometimes mistaken for black widow spiders, but they are far less dangerous. Jumping spiders donât hunt using webs, but they do build a web-like nest called a retreat.
It is an extreme or irrational fear of spiders. Someone is arachnophobic when their fear of spiders reaches a level that it is irrational, illogical and unhelpful. A certain level of fear is healthy. Not wanting a large beastie to crawl over you is perfectly normal. So too is wanting to stay away from venomous creatures in parts of the world where they can be dangerous. Running scared of your average house spider, on the other hand, is not in any way useful or warranted.