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.
Symptoms of foot drop may include the following: 1  Difficulty lifting the front part of the foot. 2  Dragging of foot on the floor while walking. 3  Slapping the foot down onto the floor.  Symptoms usually in one leg 1  only. Standing with the foot outward.  Pain in lower leg, calf muscles, and 1  ankles. Pain in flexing the 2  toes. Weakness in  toes.