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Table 1 Auricular acupoints selected in our protocol (with location and function)

From: Auricular acupressure for adverse events following immunization related to COVID-19 vaccine injection: study protocol for a multicenter, three-arm, blinded randomized controlled trial

Group Auricular acupoints Anatomical location Main function(s) according to TCM
For the auricular acupressure group Shenmen (TF4) The upper part of the posterior 1/3 of the triangular fossa of auricle (a Area 4 of auricle triangular fossa) Insomnia, abnormal sweating, pain, cough, asthma, vertigo, hypertension, allergy, withdrawal syndrome, epilepsy
Pi (Spleen, CO13) Below the BD line of the auricle and above the posterior part of the concha cavity (Concha 13 area of auricle) Diarrhoea, abdominal distention, constipation, loss of appetite, functional uterine bleeding, excessive leucorrhea, inner ear vertigo, edema, visceral ptosis
Xin (Heart, CO15) In the middle of the concha cavity of the auricle (concha 15 area of auricle) Tachycardia, arrhythmia, angina pectoris, spontaneous sweating, night sweats, hysteria, sore tongue, palpitation, insomnia, forgetfulness
Pizhixia (Subcortex, AT4) On the inner side of the opposite tragus of the auricle (zone 4 of the opposite tragus of the auricle) Pain, neurasthenia, gastric ulcer, pseudomyopia, diarrhoea, hypertension, coronary heart disease, arrhythmia, insomnia
Jiaogan (sympathetic, AH6a) At the junction of the anterior segment of the lower foot of the opposite ear wheel of the auricle and the inner edge of the ear wheel (anterior segment of zone 6 of the opposite ear wheel) Autonomic nervous function diseases, visceral pain
For the sham auricular acupressure group Gangmen (Anus, HX5) In front of the triangular fossa of the auricle (ear wheel area 5 of the auricle) Haemorrhoids, anal fissure
Niaodao (Urethra, HX3) At the anterior and upper part of the protrusion of the foot of the auricle (ear wheel area 3 of the auricle) Frequent urination, urgent urination, urinary pain, urinary retention
Helix 1 (HX9) Below the tubercle of the auricle (ear wheel area 9 of the auricle) Tonsillitis, upper respiratory tract infection, fever
Helix 2 (HX10) Just below the Helix 1/ HX9 (ear wheel area 10 of the auricle)
Helix 3 (HX11) Just below the Helix 2/ HX10 (ear wheel area 11 of the auricle)