"感觉到头疼" 这个短语在英文中可以表达为 "feel a headache" 或者 "have a headache."
头疼是一种常见的疼痛，通常是由眼睛、颈部、脑部、头顶或者头皮的疼痛感引起的。它可能是由多种因素引起的，包括压力、疲劳、饮食、睡眠不足、感冒、生理期或者其他疾病。
下面是一些例句：
"I have a headache. Can you get me some aspirin?" (我头疼，你能给我一些阿司匹林吗？)
"I feel a headache coming on. Maybe I should pe down for a while." (我感觉头疼要来了，也许我应该躺一会儿。)
"I get headaches easily. I think it's because I don't drink enough water." (我很容易头疼。我想是因为我喝水不够。)
"I've had a headache all day. I think it's because of all the stress at work." (我一整天都头疼。我想是因为工作压力太大了。)