Small hard spots on fingers may be related to callus, common warts, boils, etc. General treatment, physical therapy, medication, etc. should be chosen according to the cause. 1. For calluses, salicylic acid medication such as salicylic acid ointment and retinoic acid medication such as retinoic acid cream can be used externally as prescribed by the doctor; liquid nitrogen freezing can remove the overgrown stratum corneum. 2. For warts caused by common warts, you can follow the doctor’s instructions to use 40% salicylic acid ointment and other salicylic acid medicines, paxillin diluted with procaine and injected at the root of the warts, etc.; cryotherapy, laser, electrodesiccation and electrocautery and other physical therapy can remove common warts. 3. For those caused by boils, 20% ichthyol ointment and 3% tincture of iodine can be used externally as prescribed by the doctor; far infrared rays, ultra-short-wave irradiation and other physical treatments can help to eliminate boils. It is recommended that people who have small hard spots on their fingers should go to the hospital in time to get a clear picture of the cause of the disease, and carry out standardized treatment under the guidance of the doctor, do not self-medicate.