Blisters are small problems with an impressive ability to end a run. Prevention usually comes down to reducing movement, moisture, pressure, and repeated friction before a hot spot becomes a wound.
Start with shoe fit
Your toes need room to spread and your heel should feel secure without aggressive pressure. Fit changes by model, foot shape, sock thickness, distance, heat, and swelling. A familiar size is only a starting point.
Choose socks deliberately
A well-fitting technical sock can move moisture and reduce bunching. Seam placement matters. Replace socks that have become thin exactly where rubbing occurs.
Treat the first hot spot as information
Stop early enough to adjust a sock, relace, dry the area, or apply a protective dressing. Ten seconds of inconvenience is cheaper than finishing the run on damaged skin.
Test before race day
Shoes, socks, insoles, tape, lubricant, and race distance interact. Use long training runs to test the complete combination rather than introducing a single “miracle” product on race morning.
Recurring, severe, infected, or slow-healing blisters—particularly if you have diabetes, circulation concerns, or reduced sensation—deserve advice from a qualified health professional.