Benign Paroxysmal Positional Vertigo (BPPV): This condition is characterized by brief, intense episodes of vertigo triggered by specific head movements. The presence of earwax (cerumen) might be coincidental, but impacted earwax can sometimes contribute to the sensation of dizziness or imbalance by affecting the ear canal or middle ear. BPPV is a common cause of vertigo and can be associated with lightheadedness and dizziness.

Vestibular Migraine: This condition can cause vertigo, dizziness, and lightheadedness, often accompanied by migraine headaches. While earwax is not directly related to vestibular migraines, the symptoms can sometimes be triggered by factors that also lead to earwax impaction, such as ear canal irritation.
Labyrinthitis: An inner ear disorder characterized by inflammation of the part of the inner ear responsible for balance (labyrinth). Symptoms include dizziness, vertigo, and sometimes lightheadedness. Earwax might not be directly related but could potentially exacerbate symptoms if it affects the ear canal.
Middle Ear Problems: Issues such as otosclerosis, a condition where abnormal bone growth in the middle ear causes hearing loss, or a middle ear infection, could lead to feelings of dizziness or lightheadedness, especially if there's associated ear fullness or discomfort from earwax.

Stroke or Transient Ischemic Attack (TIA): Although less common, a stroke or TIA can present with sudden onset of dizziness or vertigo. It's crucial to rule out these conditions due to their severe consequences. Earwax would be an incidental finding in this case.
Meniere's Disease: A disorder of the inner ear that affects balance and hearing. Its symptoms include vertigo, tinnitus, hearing loss, and the sensation of ear fullness. While earwax is not a cause, it could potentially exacerbate the feeling of fullness.
Acoustic Neuroma: A non-cancerous tumor on the nerve connecting the inner ear to the brain. Symptoms can include dizziness, balance problems, and hearing loss. Earwax might be an unrelated finding.

Perilymphatic Fistula: A condition where there's an abnormal connection (fistula) between the inner and middle ear, leading to symptoms like vertigo and dizziness. It's a rare cause but should be considered in the differential diagnosis, especially if other symptoms like hearing loss are present.
Ototoxicity: Certain medications or substances can damage the ear and cause symptoms including dizziness and vertigo. This would be an uncommon diagnosis but should be considered, especially with a history of exposure to known ototoxic agents. Earwax would likely be an incidental finding.