Pinhole-like red dots on the fingers are painless and itchy may be caused by spider nevus, allergic purpura, syphilis, and so on.
1. Spider nevus: It is a red vascular lesion, mostly seen in liver diseases. This characteristic lesion is a kind of capillary dilatation formation, may be a single presence or multiple appearances, usually does not appear pain, itching symptoms.
2. Anaphylactic purpura: patients mainly manifested as skin purpura, commonly found in the limbs. Purpura varies in size, is purplish red, slightly higher than the skin, press the color does not fade, can be fused with each other. There are no symptoms of self-consciousness.
3. Syphilis: It is a chronic sexually transmitted disease caused by the syphilis spirochete that invades multiple systems. Patients may present with skin symptoms in the form of red or reddish-brown papules, which are similar to those of common skin diseases and usually do not itch, are painful, or are only slightly itchy.
Pinhole-like red dots on the fingers without pain or itching may also be seen for reasons such as blood clotting disorders. If they do not subside for a long time, it is recommended to go to the hospital for diagnosis and treatment by a specialized doctor.