what cause random foot blister when there was no running
The fluid inside a blister is called serum or plasma. This fluid is usually clear, but it can also be red if the blister is filled with blood, or yellowish green if it is filled with pus, indicating an infection. Blisters may appear on one foot or both feet, and they do not discriminate based on gender, age, or race. Blisters on feet can be caused by numerous things, including: Forceful rubbing or friction on the foot. Bone spurs or exostoses.
Narrow shoes can cause blisters on the big toe and little toe. A shallow toe box can lead to blisters on the tops of the toes, while loose shoes can create blisters on the tips of the toes. * When trying on shoes, be sure to wear the same socks, insoles, or orthotics that you wear when training or racing.