tread on sb.'s toes/corns 与 step on sb.'s toes/corns 两者均可表示“(无意)冒犯、惹着、伤害某人感情”，可换用。

• I hope I'm not treading/stepping on any teacher's toes by complaining about our educational system.
  我希望我对我们的教育制度表示的不满不会冒犯到任何老师。
• The boss is in a bad temper today. Take more than the usual care not to step/tread on his corns .
  老板今天脾气不好，要比平时更加小心不要惹着他了。