In a proper fraction, the numerator is smaller than the denominator. This holds true no matter how large both are. As long as the numerator is the smaller of the two, the fraction is a proper fraction. For example, 998/999 is a proper fraction. Even though the numbers are both large, and they're only separated by 1, the numerator is still smaller than the denominator. Likewise, 1/999 is a proper fraction.
Due to the fact that the sural nerve is so close to the surface of the skin, it makes it much more likely to become injured due to compressions on the skin and the fact that most injuries occur on the surface of the skin.
Anterior tarsal tunnel syndrome refers to compression of the deep peroneal nerve. It is rare and causes pain, weakness, and sensory changes of the foot and ankle. Distal tarsal tunnel syndrome is caused by compression of the the first branch lateral plantar nerve or the medial calcaneal nerve and presents with heel pain.