The incision, which can be done at a 90 degree angle from the vulva towards the anus or at an angle from the posterior end of the vulva (medio-lateral episiotomy), is performed under local anesthetic (pudendal anesthesia), and is sutured closed after delivery.
Hamstring hyperextension can occur during exercise and stretching. The hamstrings are a group of muscles found at the back of the thigh. Three muscles are in this group: the biceps femoris, the semitendinosus and the semimembranosus. The function of these muscles is to bend the knee and to extend the hip. It is common for these muscles to become hyperextended and injured.
The signs and symptoms of a hamstring strain are: (1) pain when moving or stretching of the leg, (2) muscle spasms of the injured muscles, (3) swelling over the injury, (4) Weakened leg (moderate or severe strain), and (5) Crepitation (âcracklingâ feeling and sound when the injured area is pressed with fingers). A moderate or (grade II) strain, which is a tearing of fibers in a muscle or tendon or at the attachment to the bone. 2  Strength is diminished. 3  A severe or (grade III strain), which is a rupture of the muscle tendon-bone attachment, with separation of fibers.