No, not all ear tumors are cancerous. Non-cancerous tumors like cysts or polyps in the ear may only require monitoring or minor treatment. However, cancerous tumors may need more intensive care, such as radiation or surgery. If you suspect you have an ear tumor, you should consult an ENT specialist for immediate medical attention. 

There are different causes of ear tumors. Some of the common culprits include chronic infections, genetic predispositions, and sun damage, particularly for outer ear tumors. Other environmental factors like exposure to certain chemicals, loud noise, and radiation may also contribute in some cases.

Ear tumor treatments depend on the type and location of the tumor. Non-cancerous tumors may require low-level intervention methods like medical monitoring and minimally invasive surgical removal, while cancerous tumors might need radiation, surgery, or chemotherapy.

If you experience persistent or severe symptoms like hearing loss, discharge, ear pain, or a lump in your ear, it's best to schedule an appointment with an ENT specialist as soon as possible. Early detection is crucial for the successful treatment of ear tumors, so it's important to see a doctor if you experience any concerning symptoms.