Bump on chin from 2 years ago - how to remove the scar tissue or hematoma? (Photo)

Thank you for your question and for explaining the history behind the bump on your chin.

From your description, it sounds like the bump could be the result of scar tissue formation, fat pad displacement, or fibrosis from the initial trauma. Sometimes when a chin injury heals, the soft tissue underneath can become firm, uneven, or even atrophic in areas surrounding the scar. Here's a breakdown of your options:

1. Scar Tissue Reduction (if it’s firm/fibrotic):
If the bump is from thickened scar tissue or fibrosis, treatments such as steroid injections, subcision, or microneedling with RF (radiofrequency) can help break down the fibrotic tissue.

In some cases, laser resurfacing (like fractional CO₂ or erbium) may improve the skin texture and reduce the visibility of the scar.

2. Filler for Contour Correction:
If the surrounding area appears indented or the bump is accentuated by nearby volume loss, dermal filler can help even out the contour.

A chin filler can also restore lost projection or symmetry and reduce the appearance of a “witch's chin” shape, especially when trauma flattens or alters the natural chin line.

3. Surgical Options:
If the bump is persistent, large, or contains a deep hematoma/calcified lump, minor surgical excision might be required to remove the fibrotic nodule.

A chin implant is generally reserved for structural deficiencies rather than post-trauma contour irregularities, so this would be a more aggressive option unless there's a major loss in projection.

4. Imaging (If Needed):
Occasionally, imaging such as ultrasound can help determine whether the bump is solid scar tissue, fat pad disruption, or residual hematoma.

Conclusion:
The good news is that there are non-surgical and minimally invasive ways to address post-traumatic chin contour issues. A combination of scar treatment and volume restoration using filler can usually provide natural-looking improvement without requiring implants. Evaluation in person helps clarify the best path depending on the texture, firmness, and surrounding anatomy.

At least from the one photo provided, and from the history of trauma, the likely issue is one of a hypertrophic ("proud flesh") scar. Intralesional injections of an anti-inflammatory agent, such as triamcinolone acentonide suspension, properly injected in an appropriate amount and concentration, would be a logical first choice for flattening the scar. A chin or HA filler implant would increase projection of the chin and likely make the bump a bit less protruding, but neither would improve the scar directly.
You would be wise to consult with an experienced, board certified cosmetic dermatologist scar treatment specialist and best of luck.