Why am I still dizzy after ear syringing?

The swelling and firmness you are having might be due to the soft tissue damage or inflammation due to the trauma. It is necessary to be cautious about these symptoms, as they might last for some weeks. To promote adequate healing and eliminate any unknown issues, I advise you to make an appointment for an extensive assessment. 

The feeling of noises in the ear, called tinnitus, can be very distressing. Tinnitus in such cases is usually nerve damage caused by the mumps infection. Sadly, in some cases, the hearing loss may not be reversible. To manage the symptoms, your brother can try listening to soothing music, using white noise machines, and avoiding loud noises. Counseling or therapy can also be helpful for the patients. 

Fever , as well as pain in the neck and the ears could mean that there is a possibility of infection. It is important to consider visiting an ENT specialist who will examine the symptoms and offer the right treatment.

You might have a medical condition known as "tinnitus". It can be accompanied by ringing in the ears and even the illusion of hearing someone else’s voice echoing. Causes could be exposure to loud noises, ear infections, or even stress. In this regard, you should reduce your exposure to environmental noise, stress-excessively manage your life without resorting to medicines, and use background noise.

Allergies are your body's reaction to a foreign particle, which the immune system recognizes as an invader resulting in nasal congestion and blocking airflow. Consequently, your sleep is disturbed and feeds into fatigue over the day. You can try a humidifier, clean your room, and avoid allergens such as dust. In cases where the techniques mentioned aren't helpful, consult an ear, nose, and throat specialist for other possible alternatives.

It appears that inflammation within your sinuses might be­ responsible for your headache­. When sinuses become­ aggravated or infected, this condition arise­s. You may experience­ facial pressure, nasal congestion, or e­ven coughing. To alleviate symptoms, conside­r utilizing a humidifier, consuming ample water, and applying saline­ nasal spray. However, if relie­f remains elusive, consult your physician re­garding alternative reme­dies.