Spontaneous muscle cramps
are commonly seen in hypocalcemia
. Prolonged contraction of the respiratory and laryngeal muscles causes stridorous breathing and can cause cyanosis(bluish discoloration due to decreased oxygen supply) and extremities- lips, fingers become cold due to narrowing of the blood vessels.Hypocalcemia is most commonly caused due to the suboptimal functioning of the parathyroid gland
.I suggest you to consult physician for further evaluation.Anemia can be ruled out by knowing your hemoglobin
levels (nomal is 12-16 mg/dl).If you have an associated wheeze(not mentioned in your history) this could be asthma.Hope this helps.Take care.