The dark redness in the gum after bleeding may be due to localized gingival inflammation or a small hematoma (blood accumulation under the tissue). Since the redness is gradually reducing, it indicates healing. However, persistent inflammation could be due to plaque or tartar accumulation, trauma from brushing, or food lodgment.
Next Steps
Visit a dentist for a clinical examination and professional cleaning (scaling), if needed. Also, follow a gentle brushing technique using a soft-bristled toothbrush and maintain oral hygiene with twice-daily brushing and daily rinsing with an antibacterial mouthwash like chlorhexidine (for a short term under dentist supervision).
Health Tips
Avoid picking or brushing harshly over the affected area. If swelling, pain, or pus develops, seek immediate care. Regular dental checkups every 6 months help prevent such issues.