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The cold flushes, black outs could be due to possible less blood sugar due to inadequate food intake. Do you also have sweating and tremors at that time. Since you mentioned chest pain
, you need t get blood pressure checked and it is mandatory to get heart examined by a Doctor, including take an Electrocardiogram and other required tests to rule out any heart disease
. Also do blood sugar tests to rule out possible Diabetes and low blood sugar
as well. Keep well hydrated. Exercise daily moderately. Eat healthy, plenty of fresh fruits and green leafy vegetables which will also provide essential vitamins and minerals
. Avoid missing meals. Eat diet rich in proteins like cereals, pulses, chicken, eggs, lean meat for good protein and calcium source. Consult a Doctor and discuss the possible cause of this problem and get adequate management.