touchy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Tending to take offense with slight cause; oversensitive.
• adjective Requiring special tact or skill in handling; delicate.
• adjective Highly sensitive to touch. Used of a body part.
• adjective Easily ignited or exploded.

from The Century Dictionary.

• Apt to take offense on slight provocation; irritable; irascible; peevish; testy: tetchy.
• In decorative art, made up of small points, broken lines, or touches, and not drawn in a firm unbroken line, as the outline of any pattern.

from the GNU version of the Collaborative International Dictionary of English.

• adjective colloq. Peevish; irritable; irascible; techy; apt to take fire.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective of a situation Extremely sensitive or volatile; easily disturbed to the point of becoming unstable; requiring caution or tactfulness.
• adjective of a person Easily offended; oversensitive; ticklish.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective difficult to handle; requiring great tact
• adjective quick to take offense