The money in the trust can only be spent in accordance with the rules of the trust: i.e. the directions or instructions in the documents setting up the trust. If the trust permits you to spend the money, you can, but before doing so, speak at some length with an estate planning attorney: if you can spend the money in the trust, that may affect the tax consequences, whether the trust is considered irrevocable, the ability of your creditors to reach it, etc.