what is necessary to make lymph flow through the body?!

Best Answer - Chosen by Voters

It's a natural process, it happens due to differences in osmotic pressure between your blood and tissues.In cases of changes in this, like high/low pressure (due to a diet rich in Na+, for example), the lymph flow can be compromised. Some especific massage and terapies ( e.g. lymphatic massage and lymphatic drainage ) can help in some ways.

because it contains antibodies that help fight infection (I think)