When you experience a leg or muscle cramp, it is because the muscle has constricted or tightened up. The lump you are referring to is the muscle itself that has tightened up. When your muscle relaxes, the cramp goes away.
When a muscle cramp occurs, the muscle contracts forcibly and involuntarily and doesn't relax for the time the cramp lasts. The cramp can last from few seconds up to few minutes.
Stop doing whatever activity triggered the cramp, Gently stretch and massage the cramping muscle, holding it in stretched position until the cramp stops, and Apply heat to tense/tight muscles, or cold to sore/tender muscles.
A muscle cramp is likely due to a lack of
A painful contraction of a muscle is a cramp or charley horse.
Often it is called a cramp.
A spasm or cramp
Your muscles cramp up after exercise if you do not stretch
you could cramp up and drown
A Cramp or a Sprain
The English term for "nangangalay" is cramp or muscle cramp.
after a long period of exercise a muscle can cramp