Ear infections often clear up on their own. A little fluid should be nothing to worry about unless you have pain and serious inflammation. As for myself, I get plenty of rest, take hot showers, eat hot soups and drink warm teas and take in extra vitamin C in pill form and from fruits and vegetables.
When none of that works the doctors will often prescribe medication if in pain. You need to be careful because some antibiotics and even non-steroidal medications can be Ototoxic, so talk to your doctor about these concerns. Perhaps all you need is a decongestant nasal spray or Antihistamine tablets for now, but even these carry some mild temporary Ototoxic risks. I'm not sure I want to say what brand of meds you should take because I'd hate for your Tinnitus to get worse and blame me for it.
In short, taking a Antihistamine can dry up that mucus and maybe fix the fluid buildup. The bigger picture here though is what is causing your inflammation to rise? Perhaps a food journal could help narrow down suspect foods in your diet. You could start by eliminating milk and dairy products, eggs, wheat, corn, peanut butter, dried fruit, sugar, honey, and concentrated fruit juice. Consuming too much sodium can offset your inner ear fluid levels as well.
I'm not sure how accurate this information is but I'm quoting part of it.
Reduce inflammation and stop tinnitus
http://www.naturalnews.com/031021_tinnitus_inflammation.html
"These pro-inflammatory mediators cause an increase in vasoconstriction and platelet aggregation. This decreases blood flow into the smaller capillaries of the body such as the inner ear. This inflammatory process also increases the
lymphatic fluid in the inner ear. This combination increases
pressure in the inner ear which stimulates the auditory nerve enough to create a series of action potentials that the brain interprets as sound."
"
Begin eating an anti-inflammatory diet that consists of
phytonutrient dense fruits & vegetables, healthy fat sources, and grass-fed/free-range animal products. Keep
sugar & grains to a minimum. Use coconut, olive oil, grass-fed meat, free range eggs, avocados, nuts/seeds, and non-starchy vegetables as primary fuels throughout the day. Load up on anti-inflammatory herbs such as
turmeric, ginger, dandelion, oregano, garlic, & green tea. The primary fruits that should be used are low-sugar, anti-oxidant rich sources such as berries, lemons/ limes, & grapefruits."
I've always suspected that some healthy foods might be making my tinnitus worse. Seems like the more I try to consume high antioxidant and nutrient dense foods the more problems I run into with Tinnitus. I just figured out last year that I'm allergic to sesame ezekiel bread. I was trying to avoid gluten and ended up in a scary situation of not being able to swallow solid food for days. Just another reason to keep a food journal because it could take a few days to notice problems and leave you scratching your head in confusion.