Redness, swelling and protrusion at the root of finger nails are considered to be inguinitis, lichen planus, chronic eczema, etc., which can be treated with medication, physical therapy and surgery. 1. Inguinitis: the occurrence of inguinitis is related to the infection of pathogenic microorganisms, you can use aluminum acetate solution and chlorhexidine solution to rinse, and apply mupirocin ointment and fusidic acid cream locally. If there is pus, incision and drainage are also needed. 2. Lichen planus: This is an idiopathic inflammatory disease with purplish-red flat papular lesions that occur on the extremities. If the nails are involved, it may lead to thickening and thinning of the nail plate, longitudinal grooves or nail pterygium. There may be redness and swelling around the nail. It can be treated with local injections of glucocorticoid medications, such as trimethoprim and dexamethasone, and sealing with medications such as retinoic acid ointment and avitamin A ointment. The whole body can be treated with glucocorticoid drugs, such as prednisone, dexamethasone, etc., and at the same time, oral thalidomide, tretinoin and other drugs can be used for treatment. 3. Chronic eczema: Chronic eczema on the hands will lead to rough and hypertrophic skin, mossy changes, and the involvement of the fingers will lead to local skin red dark spots, skin hypertrophy. Can be applied locally tretinoin cream, mometasone furoate cream treatment, combined with bacterial infection can be applied erythromycin ointment, mupirocin cream, etc., serious can also be combined with cetirizine tablets and other drugs. Fingernail root red swelling protrusion should go to the hospital by the doctor to clarify the cause of the disease, standardized treatment, the above drugs need to be under the guidance of the doctor to use drugs.