Blisters on the feet typically emerge due to friction between the foot and a tight or new shoe. Other common causes include wet socks, synthetic socks, or burns. The friction creates small pockets of fluid under the skin as a protective response to prevent further damage.

In some cases, blisters on the feet may also result from underlying health conditions. These include contact dermatitis, fungal infections, and dyshidrosis. Identifying the root cause is essential for proper treatment and prevention of recurring issues.