The phrase "to avoid the cold" means to stay away from or protect oneself from a low temperature that could make you feel uncomfortable or cause illness. Full definition
I always tell my patients with period pain to avoid cold foods and beverages. (mindbodygreen.com)
It's actually best for your body and digestion to avoid cold drinks but if you prefer your smoothies cold, feel free to use a frozen banana or add ice. (elevateyourwellness.com)