From what you describe:
Injury below the knee with swelling â likely a soft tissue injury (bruise/contusion, muscle strain, or ligament sprain).
The blue discolouration appearing after 2â3 days is common with bruising: blood from damaged small vessels spreads under the skin and becomes visible as the bruise changes colour (red â blue/purple â green/yellow over days).
The fact that you can walk with intermittent pain suggests no major fracture, but it doesnât fully rule out bone bruise, meniscus injury, or ligament sprain.
Next Steps
Consult a Physician first
Health Tips
Donât ignore the bruise and pain just because you can walk. Some ligament or meniscus injuries still allow walking initially but worsen later. Avoid jumping back into exercise, running, or climbing stairs aggressively until youâve had a proper assessment. If the swelling increases suddenly, bruise spreads excessively, or you feel numbness/tingling, see an orthopaedic doctor immediately.