Some peoples hands and feet are cold when the weather is cold and when is hot.
Cold fingers usually mean health problem and is especially common in the cold days, but when they are symptom of a health disorder then you may have some of these problems.
If your cold hands and feet are associated with fatigue, dizziness and headaches, it may mean that your blood is weak. Therefore you should contact a doctor and do the analysis.
Constantly cold hands and feet may be a first symptom of diabetes. The next symptom is the increased appetite.
3. Thyroid gland
When the thyroid gland has a problem and works slowly, it leads to slowing the metabolism, and then the coldness in the hands and feet.
Stress increases the adrenaline, and in turn weakens the blood circulation causing the hands and feet to be cold.