In Macbeth, explain how Lady Macbeth shows sign of her madness prior to her death.Macbeth learns of his wife's suicide just before he is to do...

In Act three, Scene two, Macbeth admits to Lady Macbeth
his plans to find "peace" for his troubled mind. He is insinuating that he will have
Banquo murdered. He states that both he and Lady Macbeth are having terrible night
visions and that they cannot live with the madness from the
nightmares:

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Before we will eat our meal in fear, and
sleep
In the affliction of these terrible dreams
That wake us up
nightly. It’s better to be with the dead,
Whom we have sent to their peace to
gain our peace,
Than to lie on a bed, torturing of the mind
In a
restless frenzy.

This is Act
three, Scene two. This is prior to Lady Macbeth's sleep walking. At this point, both
Macbeth and Lady Macbeth are having terrible dreams about the murdering of King Duncan.
Their guilt is getting to them.

Macbeth is afraid of
Banquo. Even though King Duncan is out of the way, Macbeth fears
Banquo:

O, my
mind is full of scorpions, dear wife!
You know that Banquo and his son,
Fleance, live.

Then in Act
five, Scene one, we see a doctor and a gentlewoman talking. The gentlewoman has observed
Lady Macbeth sleep walking. Lady Macbeth is quite troubled. While they are talking, Lady
Macbeth begins sleep walking. She is trying to rid her hands of bloodstains. The doctor
observes her:

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What’s she doing now? Look how she rubs her
hands.

Lady Macbeth is deeply
troubled, trying to get the spots of blood off her
hands:

Out,
damned spot! Out, I say! One; two; why, then it is
time to do it. Hell is
murky! For shame, my lord, for shame! A soldier, and afeard? What need we fear who knows
it, when none can call our power to account? Yet who would have thought the old man
to have had so much blood in
him?

Clearly, Lady Macbeth
has gone mad. She is so guilty until she cannot find rest for her soul. Even the doctor
determines that her sickness is a spiritual sickness. He tells the gentlewoman to keep a
close eye on her and to keep annoyances from her:

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She needs the divine more than she needs the
physician.
God, God, forgive us all! Look after her.
Take everything
from her that she might use to harm
herself.

Clearly, Lady
Macbeth has a troubled soul. She cannot go on in this manner. In Act five, Scene three,
the next thing we hear is that Macbeth is seeking for the doctor to cure Lady
Macbeth:

Cure
her of that.
Can’t you minister to a diseased mind?
Pluck a rooted
sorrow from the memory?
Wipe out the written troubles of the
brain,
And cleanse the burdened heart of that dangerous stuff
Which
weighs upon the heart with some sweet antidote
Which will make her oblivious
to all those things?

The
doctor informs Macbeth that he cannot help her and he
leaves.

Then in Act five, Scene five, Seyton reports to
Macbeth:

The
queen, my lord, is dead.