1. painful
2. aching, achy, agonized, agonised, agonizing, agonising, excruciating, harrowing, torturing, torturous, torturesome, burning, chafed, galled, poignant, racking, wrenching, saddle-sore, sensitive, sore, tender, smarting, traumatic, biting, bitter, prickling, stinging, tingling, harmful, inhumane, prickling, stinging, tingling, afflictive
3. sore, unpleasant, atrocious
4. abominable, awful, dreadful, terrible, unspeakable, bad, irritating
4. uncomfortable