Skin is the soft outer tissue covering vertebrates. Other animal coverings, such as the arthropod exoskeleton have different developmental origin, structure and chemical composition. The adjective cutaneous means of the skin (from Latin cutis, skin).
Sorry to hear about your problem. The numbness in the ear can be due to variety of reasons. Some of them are. Diabetes. Peripheral neuropathy. Sensory nerve trauma. Ear infection. Cold. Cerebro vascular accident. Ear injury etc. As there is no history of trauma, so ear injury and sensory nerve trauma can be ruled out. Diabetes can be detected by undergoing a blood glucose test. This numbness can be caused by a preceding throat infection which can result in ear infection leading to numbness.
This can sometimes be caused by allergies, infections, and even tumors, but it is often simply something that some people have due to their anatomy (ie, they were born with a pre-disposition to this problem). Sometimes, this clogged feeling in the ear can be a trigger for headaches. As you know, headaches can come on from almost any cause, and some people will have different things that are triggers for these headaches to start. Continued ear pain, hearing loss, and dizziness would all be potentially worrisome symptoms.