First of all determine that the above symptoms are caused by hypokalemia, that is, a deficit of potassium, and not some other cause. To do this, consult your doctor, get tested and make the biochemical analysis of blood.
If it is confirmed that the content of potassium is low, you need to adjust the diet, increasing intake of foods rich in these micronutrients. It is primarily lettuce, bananas, potatoes, oranges, grapefruits, lemons. A lot of potassium also in sunflower seeds, spicy greens (dill, parsley, mint).
In agreement with the doctor take drugs that increase the level of potassium. Thus it is necessary to carefully monitor the health, and, if necessary, make the control of biochemical analysis of blood, because the content of potassium is higher than normal is also harmful and can lead to serious diseases.
It is very important to establish the cause of lack of potassium in the body. The fact that this drawback may be caused by overexertion, unordered routine, poor diet, fatigue, physical and psychological, and the more serious causes. For example, a deficiency of this microelement may be indicative of various diseases of the liver and kidneys, dysfunction of the endocrine glands, chronic lack of glucose in the body (hypoglycemia), dropsy and many other diseases. If in the first case, it is sufficient to adjust the diet and maintain a healthy, measured way of life, avoiding fatigue, stress, the second can not do without treatment.
To establish an accurate diagnosis and choose the most effective treatment can only specialist. Therefore, in no case do not tighten with a visit to a medical facility!