Please explain what are the signs when ones cancer has gone to the brain?

Where in the brain?: General symptoms include headache, nausea and vomiting. Vomiting without preceding nausea is particularly worrisome. Headache that wakes you from sleep is concerning. Headache that starts first thing in the morning. Depending on where in the brain the tumor is, though, even very small tumors can cause almost any kids of brain symptoms (weakness, numbness, confusion, speech, balance, vision.