If you cannot find the pulse in the wrist, feel for it in the neck beside the voicebox or put your ear directly on the chest and listen for the heartbeat, or use a stethoscope if you have one. When a person is very ill, take the pulse often and write it down along with the temperature and rate of breathing. It is important to notice changes in the pulse rate. A very rapid, very slow, or irregular pulse could mean heart trouble. A relatively slow pulse in a person with a high fever may be a sign of typhoid.
Eyes Look at the color of the white part of the eyes.
Also note any changes in the sick person's vision. Pay attention to the size of the pupils. If they are very large, it can mean a state of shock. If they are very small, it can mean poison or the effect of certain drugs. A big difference in the size of the pupils is almost always a medical emergency.