When you squat you felt like there is a golf ball sized lump in your hamstring that is painful What is up?

Answer 1

If this lump showed up all of a sudden during vigorous activities like sports, you have likely strained a muscle. A strained muscle by definition is microscopic tears in the muscle tissue. These are graded I, II, III, or IV.

Grade I is minor and with a little rest will heal on its own in a week or two.

Grade II is a little more torn tissue, with more pain, requiring at least two weeks of resting, icing, and gentle stretching to heal. A lump in the muscle can appear as a secondary muscle spasm.

Grade III is a large amount of the muscle torn. It is very painful even, at rest, and usually develops a lump or dent in the muscle body from the torn tissue.

Grade IV is a complete muscle tear which oddly, after it tears usually is not painful. There is always a definite lump of muscle near its attachment because it is no longer held at both ends of the muscle. Depending on which muscle is torn, it is often aided to heal but not surgically repaired.

I almost forgot.....

If the lump came about over a longer period of time, like weeks or months, have it checked by a doctor.