Burning & painful sensitive sensation - did tear trough filler potentially hit a nerve?

I'm sorry to hear about your discomfort. Based on your description, it is possible that the filler injection could have affected a nerve, leading to the symptoms you're experiencing. The popping sensation you described might have been the needle coming into contact with a nerve or the filler being injected near a nerve, which can sometimes cause nerve irritation or damage.

The infraorbital nerve, which provides sensation to the lower eyelid, cheek, and upper lip, could potentially be involved in this type of pain. When nerves are affected during filler injections, it can lead to symptoms such as burning, pain, and hypersensitivity in the areas served by the nerve.

Nerve-related issues can sometimes resolve on their own over time, but given that you've been experiencing these symptoms for three years, it's important to seek further evaluation. Consulting with a specialist, such as a neurologist or a facial pain expert, might be beneficial. They can conduct a thorough examination and may use diagnostic tools to better understand the cause of your symptoms and suggest appropriate treatment options.

In the meantime, managing your pain and discomfort with medications, physical therapy, or other interventions as recommended by a healthcare provider might provide some relief.