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.
An injury, such as an ankle sprain, may produce inflammation and swelling in or near the tunnel, resulting in compression of the nerve. Systemic diseases, such as diabetes or arthritis, can cause swelling, thus compressing the nerve. Symptoms. Patients with tarsal tunnel syndrome experience one or more of the following symptoms: 1  Tingling, burning or a sensation similar to an electrical shock. 2  Numbness. 3  Pain, including shooting pain.