Bugs do occasionally crawl inside an ear, but I've never heard of them staying there. An ER doctor would try to wash it out with saline or use oil to kill it and then remove it with forceps. I would think rubbing alcohol fumes would force one to leave, but that's just a guess of course. I'd try putting rubbing alcohol on a Q-tip and carefully put some in there, but tip the ear so it drains out. Surely any bug would leave?
It seems more likely a hair or a plug of wax is in there and just making a lot of noise when it moves by gravity.
Hi, welcome to the forum, bug in the skull is a quiet unusual symptom and needs a proper physical and psychiatric evaluation to rule out the cause.
When you feel crawling and bugs like sensation can be seen in worm infestations like ascaris and liver flukes, cholangitis and biliary stasis, thyroid disorder and delusional parasitosis.
I suggest you to get the following parameters checked like liver function, thyroid function and absolute eosinophil count. Consult a physician.
If all the parameters are normal, if no cause is identified then you may need a psychiatric evaluation for delusional parasitosis. Take and care.