persistent irritant

noun
UK /pəˈsɪstənt ˈɪrɪtənt/
US /pərˈsɪstənt ˈɪrɪtənt/

Something that keeps bothering you and won't go away.

The mosquito bite was a persistent irritant that made it hard to sleep.


OTHER MEANINGS

2. A substance that causes lasting inflammation or discomfort on the skin or in the body.

The chemical was a persistent irritant that required careful handling.

3. A person who repeatedly causes trouble or annoyance over time.

He was a persistent irritant at meetings, always interrupting others.

4. A recurring problem that is difficult to eliminate.

Traffic congestion remains a persistent irritant for city planners.