What is the symptoms of heart disease?

Catering and stress are the main cause of heart diseases. Therefore, special attention should be paid to them. Symptoms may be given of how to identify if you have heart disease or not.

1. Excessive sweating. 
2. Nausea and nervousness and fatigue. 
3. Darkness before eyes. 
4. Walk fast. 
5. Having trouble breathing. 
6. Chest pressure 
7. Back pain, pain in the hands and swelling in the feet: – If the  kidney is damaged, the kidneys are unable to take out the poisonous material from the body.And it can go into the heart through toxic blood. Which can cause heart disease.

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What is the function of kidney? Their types, symptoms?

What is the function of kidney? Their types, symptoms?