Can blood tests, even though it searches for something else, detect cancer? i took like 4 different blood tests and was just wondering if it can

Unlikely: With the exception of leukemias, there are no good blood tests for cancer. It is very unlikely that you have cancer. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.