Hide (one's) head in the sand informal verb phrase
To avoid, or attempt to avoid, a specific problem by pretending not to see it.
Hide your head in the sand if you want to. Anyway, you must be responsible for the accident.
Don't hide your head in the sand. You need quick treatment to stop the rapid growth of leukemia cells.
To hold tightly to something with one's fingernails to avoid falling
Try to avoid to change something because doing something else could make things worse
I could have changed my answer, but I decided to leave well enough alone.