It is reassuring that your X-ray shows no fracture. Your symptoms point to a soft tissue injury, like an ankle sprain, with a localized bruise (the black spot). To manage this, you can take oral over-the-counter pain relievers such as ibuprofen or acetaminophen to reduce pain and inflammation. Additionally, applying a topical diclofenac gel directly to the area can provide localized relief. Please also practice the RICE method: Rest your ankle, apply Ice wrapped in a towel, use a light Compression bandage, and Elevate your leg. If the pain worsens or the dark spot spreads significantly, consult your doctor for a follow-up.