Claude's diagnosis:
Stable, non-worsening swelling over two days with mild redness and no severe tenderness points strongly toward extensor tendinitis — nothing alarming.
Just stick with the simple approach: rest, cold packs, topical Voltaren gel, and loose footwear. At 80, tendons take a bit longer to settle down, so give it 5-7 days of consistent rest and you should see gradual improvement.
The main thing to watch for is any sudden worsening — increased swelling, fever, or the pain becoming severe. If any of those appear, see a doctor promptly. Otherwise, this looks like something that will resolve on its own with conservative care.
And do keep an eye on that blood pressure — if it stays above 150/95 consistently, it's worth a conversation with your doctor about adjustment of medication.
Probable cause : (1) obesity (2) wearing schoes that fit poorly.