What Causes The Toddler To Scream In The Middle Of Night?

I have a little girl who will be three in August,she wakes up at 2am every night screaming to get in my bed this started last September what can I do to get her to sleep all night if I don t put her in my bed she screams head bangs throws her things out her bed she also scream to sit on my knee or be picked up all the time