How did Western medicine diagnose the disease hundreds of years ago without instruments?

As we know, Western medicine requires high-tech means of blood, urine, stool, fluoroscopy, CT, and bacterial culture for diagnosis. Nowadays, if you have a cold, your doctor will usually ask you to take a blood test, and if you have a cough, a chest X-ray. Of course, some say this is overmedication, others say it's scientific precision, and there's no consensus.

To my own experience of seeing a Western doctor when I was sick, with media reports, if there is no sound, light and other instruments when Western medicine, modern estimates of what can not see the disease, can use the means is a thermometer with a stethoscope, the best case scenario is to look at the point of headache and cold.

Now, we can not diagnostic means of Western medicine Chinese medicine, Chinese and Western medicine should be the difference between the treatment method, the instrument can be used for Chinese medicine, Chinese medicine is magical, and even considered pseudo-scientific, mainly Chinese medicine is too mysterious, too magical, with the I Ching, the five elements of the gossip is as magical, and even extraterrestrial civilization, no wonder that even the scientists do not understand the Chinese medicine method, the formula, more than the transmission of down, Shennong! Taste all kinds of grass, this is a legend, taste over?