57 cases of common cold, influenza, acute tonsillitis and acute bronchitis were treated by rapid needling with filiform needles at Dazhui (Du 14), Fengchi (GB 13), and Quchi (LI 11). The indices for observation were first determined, and the 19 cases that manifested an axilla temperature drop of over 1 degree C after treatment and a ratio of < 0.3 of the main symptom scores after treatment were regarded as markedly effective; the 27 cases that manifested an axilla temperature drop of 0.5-1.0 degree C and a symptom score ratio of 0.3-0.6 were regarded as effective, and the 11 cases that manifested an axilla temperature drop of < 0.5 degrees C and a symptom score ratio of > 0.7 were regarded as failures. The total effective rate was 80.7%. Analysis of the individual patients indicated that the peripheral blood leucocyte and lymphocyte counts differed insignificantly after needling, while the body temperature, rate of respiration, pulse, blood pressure and acupoint temperature all dropped, with a simultaneous increase in the percentage of T-lymphocytes. The immediate effects were especially marked in fevers due to exogenous wind and cold.