Small transparent blisters on the face may be related to herpes simplex, or may be caused by eczema, prickly heat and other reasons. 1. Herpes simplex: usually caused by infection with the herpes simplex virus, which can lead to small transparent blisters on the face, and can be accompanied by symptoms such as itching and pain in the affected area of the skin. 2. Eczema: Commonly found in people with allergic body, as the face comes into contact with pollen, dust mites, cosmetics and other substances, it is likely to cause an allergic reaction, triggering eczema, which leads to long transparent blisters on the face, and may also be accompanied by oozing, erythema, itchiness, burning pain, and so on. 3. prickly heat: common in the hot summer, due to a long time to stay in a higher temperature environment, resulting in more sweat on the face, if the sweat is not discharged in a timely manner, easy to cause inflammation of the skin, triggering prickly heat, which will lead to the face of a long transparent blisters, but also accompanied by obvious itching, burning sensation and other symptoms. If the symptoms continue to be unrelieved and accompanied by other discomforts, you should seek medical attention as soon as possible, and under the guidance of a doctor after a clear diagnosis.