Self-consciousness; awareness of oneself, often causing one to feel nervous or overly concerned about how one appears.
人前で話すとき、彼は自意識が強くてうまく喋れない。
When speaking in public, he is so self-conscious that he can't speak well.
思春期は自意識が高まる時期だと言われている。
Adolescence is said to be a period when self-consciousness increases.
自意識過剰にならないようにリラックスする方法を探している。
I'm looking for ways to relax so I don't become overly self-conscious.