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...
The most common cause of foot drop is injury to the muscle or nerve that controls the foot.Other causes include-. 1  Paralysis of muscles of ankle and foot. 2  Nerve damage. 3  Muscle damage. 4  Nervous system disorders. 5  Multiple sclerosis. 6  Diabetes. 7  Parkinsonâs disease. 8  Tumor or stroke. 9  Muscular dystrophy.
Of the 90 causes of Foot drop that we have listed, we have the following prevalence/incidence information: 1  3 causes are very common diseases. 2  2 causes are common diseases. 3  2 causes are uncommon diseases. 4  0 causes are rare diseases. 5  5 causes are very rare diseases.  83 causes have no prevalence information.