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.
Regardless of the foot drop cause for the specific patient, the fact remains that a dropped foot can produce many difficulties, including the inability to: 1  Raise the foot at the ankle. 2  Point the toes upward at the body (this movement is known as dorsiflexion). 3  Walk normally in the heel-to-toe fashion.