Spasmodic pain in a muscle is called cramps. It occurs commonly due to a vascular disease, in pregnancy or due to overexertion protein deficiency and in old age. It may also occur in people who are taking diuretics.
Acupressure points for cramps:
Reflex points: 10+3+8 points of lower limbs, hip, knee, sciatica, lower spine, parathyroid, adrenal.