Could you tell me what are signs a brain tumor is getting worse?

Neurological problem: If a patient is known to already have a brain tumor, some of the symptoms that it is getting worse include progression of neurological symptoms. This could be manifest as increased weakness (if near motor functions), or speech problems (if near speech areas). Increased swelling or edema around the tumor can lead to headache, sleepiness, trouble with mentation.

Worsening of symptom: If you have increasing headaches, seizures, or neurological dysfunction, then that may be a sign of a tumor growing/regrowing. Otherwise, if the growth is small, you would not have any symptoms.