I know nothing---except from personal experience. Standing, put your toes/ball of foot on something that creates a 90 degree angle for your knee. drop your heel down gently, increasing it as you can and leaving it longer. this is the only stretch that I know of that stretches that last muscle/ligament? from the calf down. stand on first step on staircase---holding on and drop your heels down one at time leaving balls feet /toes on step. Ice/ice/ice/ice. Put voltarin/en? cream on as directed. Start your day with a sports aid in your water for minerals/salt...if you pre-load your body with this your body does not get in distress as easily/quickly. Drink lots of water the rest of the day. Also---more stretches---sit and twirl your feet in both directions for many rotations, not moving your legs, then do point (out hard) and (imaginarily) pull back with your feet again not moving your legs. Google standing leg stretches against a wall. Massage the bottom of your feet. Massage your legs best you can if you can't find physiotherapy. Freeze (hard to find I know) a plastic bottle of water and roll your feet over it back and forth while standing with some pressure. Stretch first thing in the am, before you walk, stretch during your walk, stretch after you walk, stretch before bed.
Until someone more useful comes along: RICER.
When DH had a swollen ankle that would not support weight, we walked into the clinica and told them our situation. They do have a way to email you a bill. They took down our info, including passport number, and after an examination ("Was there an argument?" apparently the anti domestic abuse campaign was on that week) referred us to the Urgencia (accessed by going to the taxi stand down the block) and there they took X-ray, diagnosed a fracture, put a soft cast on, wrote a script for some meds and crutches, and turned us over to another taxi. Some weeks after our flight home, I received a factura in my email and paid the 56 euro they charged. (Plus wire fees and conversions, came out somewhat over $100 overall.) Definitely try the clinica as it's probably closer. Your lodging person will tell you where it is.
Here’s a link to a clinic in Leon that specializes in podiatry and physical therapy.
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Not nearly enough information in your description to really offer advice. If it’s your Achilles I would recommend a heel lift in your shoes. If it’s more of a strain/sprain the ibuprofen and possibly an ace wrap or a stretchy ankle support. If it’s blisters then treat the blisters. If you have no contraindications to taking ibuprofen I would definitely start a course of 600mg three times per day with food. Good luck.
Google works in Europe! Honestly, "nearby" on Google maps will show you the closest pharmacies and medical centers. The staff at albergues/hostals/hotels will have that information as well. I'm not sure why those aren't the first things people do when injured or ill.
