11.14

71 swing n. a big or sudden in people's opinion, emotion,

  mood swing

2.food craving

3.be to blame

4.PMS is interfering with your daily activities

5.irritate v.

1)to make your body sore or painful

2)to make sb angry,impatient

stimulate v. to make sth active

6.scar tissue

scar

7.the leading preventable cause

the leading= firstly

8.contract  v. beome less or smller

    the contraction and expansion of blood vessels