The longevity of the ink depends on the pen, but most are about 6â8 months. If the pen dries up, you can try heating up the ballpoint part with hot water in case the rollerball is stuck. Another option is to keep the casing and purchase a refill f...
Common Causes of Foot drop. 1  Muscle disease. 2  Peroneal nerve. 3  Sciatic nerve. 4  Lumbosacral plexus. 5  L5 nerve root. 6  more common causes...Â».
There are a number of reasons why burning feet occur. 1  Diabetes is one of the most common reasons. This is because diabetes often results in polyneuropathies, especially affecting the extremities. 2  Nerve damage can also be caused by other factors, including heavy metal poisoning and vitamin deficiencies.