15 days after nail puncture in foot - foot is slightly puffy and minorly sore - no other problems. is this normal course of healing for this wound?

Tetanus? Infection?: I see they you received tetanus prophylaxis which is excellent. Swelling g and pain is normal for three weeks but it should be improving and if it is getting worse, i would see a physician for possible x-rays as well as antibiotics.

Puncture Wound: You need to seek medical attention to make sure you do not have an infection that requires antibiotic treatment.

Have it evaluated.: Puncture wounds can lead of severe infections especially in diabetics. These infections could spread deep down to bone. If it gets severe enough, this could lead to loss of limb or even life. With puncture wounds, one may also develop tetanus. Often, people with numbness will delay treatment. Have the wound properly evaluated and treated to avoid preventable complications.