hi, as mentioned by you the brief history, what I can understand is that you have swollen ankles and might be painful. After walking for two days in a row there is possibility that you may have got DOMS - Delayed onset muscle soreness. which is common in most people post any excessive physical activity. Also, you mentioned you are obese than you need to perform physical exercise to lose the excessive accumulation and get the muscle tonned. Due to excessive walking there is a soreness in the muscle fibers and are not able to make the Venus return to the optimum. Also as you have done all of a sudden a good physical exertion there will be fluctuation in the blood pressure and cholesterol. Infact most systems will have fluctuation as it is normal. chances for any breaking of the blood vessels is uncommon due to walks, but if you want to confirm a Doppler of the lower limbs is recommended to figure out if there are any. for swelling of the ankles you need to first keep the legs elevated and perfrom ankle toe movements. Also, understanding that physical exercise is recommended highly in you as you are obese. But prior to any exercise regimen a cardiac clearance will be of an advantage. regards Jay Indravadan Patel