a thin skin

(a) thin skin

A personality or disposition that is easily offended or upset by something that is said. Watch what you say around Uncle Ed—he has such thin skin and gets angry at the slightest provocation. You can't have a thin skin if you want to be an actress—harsh reviews are all too common.
See also: skin, thin
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

a thin skin

COMMON If someone has a thin skin, they are very easily upset or offended by criticism. He'll never make it in journalism with such a thin skin. Note: You can also describe someone as being thin-skinned. She didn't mean it as an insult — you're too thin-skinned!
See also: skin, thin
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

(have) a thick/thin ˈskin

(informal) (be) not affected/affected by criticism or unkind remarks: A traffic warden needs a thick skin to take so much abuse from motorists.He’s got rather a thin skin for a politician. He’ll have to learn to take the odd unkind remark. ▶ ˌthick-ˈskinned, ˌthin-ˈskinned adj.
See also: skin, thick, thin
Farlex Partner Idioms Dictionary © Farlex 2017
See also:
References in classic literature ?
Switzerland is simply a large, humpy, solid rock, with a thin skin of grass stretched over it.
FOR a tough guy, Roy Keane seems to have a thin skin when it comes to Jose Mourinho's slightly early handshake.
In some places, modern block houses are simply being overclad with a thin skin of brick.