Why does my filler randomly swell months later?

Swelling in an area where a dermal filler was injected can occur for several reasons, even months after the procedure:
1. Inflammatory Response: Your body might mount an immune response to the filler material, leading to inflammation and swelling.
2. Infection: Though rare, a late-onset infection can cause swelling.
3. Physical Trauma: Any trauma or injury to the treated area can cause swelling.
4. Allergic Reactions: Some people may have delayed allergic reactions to the filler material.
5. Hyaluronic Acid Absorption: If your filler is hyaluronic acid-based, it can absorb water over time, leading to swelling.
6. Exercise and Heat: Both can increase blood flow, leading to temporary swelling in the areas where fillers are present.
7. Other Health Conditions: Conditions like sinusitis or dental infections can cause swelling in areas where fillers are present.
If you experience persistent or concerning swelling, it's important to consult with your healthcare provider or the professional who performed your filler injections. They can help identify the cause and suggest appropriate treatment. Remember, this advice is intended to be general in nature, and specific causes may not apply to your situation. Always consult with a healthcare professional for accurate information.