You can determine if the tick has cleared by observing the skin, observing the body, and the patient’s symptoms. 1. Skin observation: Patients can determine whether the ticks have been removed by carefully observing the skin. If the tick has not been removed, there is usually a partial depression in the skin and a black substance in the depression, which is the mouthparts of the tick; if the tick has been completely removed, there will not be any depression in the skin and black mouthparts of the tick. 2. Comparison of the body: After removing the tick, the patient can judge by observing the integrity of the tick’s body. If you are not familiar with the tick structure, you can go to the Internet to find pictures of ticks for comparison and observe whether the mouthparts are missing in the front. 3. Symptoms: You can also determine whether the tick has been removed by the patient’s subsequent symptoms. If the tick is not removed, it will lead to local inflammation, which can be manifested as local redness and swelling, and may be accompanied by pain, and in severe cases, local infection will occur; if it is removed, there are generally no such subsequent symptoms. Once patients find themselves with ticks, it is best not to remove them by themselves, but to consult a doctor in time, under the guidance of the doctor by applying ether on the biting area to make the ticks fall off by themselves. If the tick has already been removed but its mouthparts are left inside the skin, it is necessary to consult a doctor to remove it in time to avoid infection.