self-conscious

From self- +‎ conscious.

self-conscious (comparative more self-conscious, superlative most self-conscious)

1. Aware of oneself as an individual being.
2. Excessively conscious of one's appearance or behaviour.
   • 1907 August, Robert W[illiam] Chambers, chapter IX, in The Younger Set, New York, N.Y.: D. Appleton & Company, →OCLC:

     “Heavens!” exclaimed Nina, “the blue-stocking and the fogy!—and yours are pale blue, Eileen!—you’re about as self-conscious as Drina—slumping there with your hair tumbling à la Mérode! Oh, it's very picturesque, of course, but a straight spine and good grooming is better. […]”

4. Uncomfortably over-conscious of one's appearance or behaviour; socially ill at ease.