Do tourette's outbursts happen more when you're stressed or relaxed or both?

Either: It really depends on what mechanisms/techniques of suppression one is most skillful at.

Stressed: In general, someone with tourette syndrome will tic more when stressed out. Seeing other kids tic may increase your child's tics. This is not always the case and there may be an increase in tics for no real, apparent reason. In general, tics become worse with anxiety.

Tourette: Outbursts occur mostly for no apparent reasons, but stress & anxiety can trigger them.