Long-term bedridden two toes blackened may be fungal infection, diabetic foot, lower limb thrombosis and other reasons. 1. Fungal infection: when the toe infection fungi lead to nail bed lesions, causing onychomycosis, can be manifested as nail plate turbidity, discoloration and other manifestations, so there may be black toes, thickening, scaling and other manifestations. 2. diabetic foot: long-term bedridden two toes black can also be diabetic foot, poor blood sugar control, the body long-term high sugar level, will cause damage to the nerves and blood vessels, can make the blood vessels or capillaries occlusion, accelerate the peripheral arteriosclerosis, occlusion and stenosis of the lesion process, and then foot infection, ulceration, gangrene and so on, so that the two toes blackened symptoms. 3. Lower limb thrombosis: long-term bedridden may lead to the formation of lower limb deep vein thrombosis, with the development of the disease, there can be limb swelling, calf, dorsum of the foot blisters, the skin temperature can be significantly reduced and present greenish purple, or even black. Long-term bedridden two toes blackened is recommended to timely visit the hospital, under the guidance of the doctor for active treatment.