Soy isoflavone extracts and supplements are available as dietary supplements without a prescription in the US. These products are not standardized, and the amounts of soy isoflavones they provide may vary considerably.
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.
1 Common illnesses such as colds, flu, and ear and sinus infections are some of the most frequent causes of headaches in children. More-serious infections, such as meningitis or encephalitis, also can cause headaches, but are usually accompanied by other signs and symptoms, such as fever and neck stiffness.  Head trauma.