If a pulse is Tight pathologically, however, which is less common, it indicates stagnation. Cold is the chief cause of stagnation manifesting as Tightness in the pulse. Damp causes resistance too, but a Damp, Tight pulse is called Slippery. Tight pulses can be Slow, reflecting the Cold, or Rapid, indicating the beginning of the generation of Heat in response to Cold. Since Cold has a constrictive quality, a Tight pulse can indicate lateral, costal and flank pain. Tightness can also indicate the consumption of Yang, which results in Cold. True stagnation is present in a pulse that does not give way. If a Tight quality is found but gives way when you push beyond it, it is technically not a Tight pulse, but Leathery, Firm, or Hidden. A pulse could be Tight perhaps on the surface level and then Hidden on the deep level. That would technically not be a pulse of true stagnation.
Psychologically a Tight pulse can mean resistance to change, physical hesitation, sluggishness or fatigue.