Hello, Orange tinted skin, local to one certain area, can result from various reasons, and/or conditions. This can be stemming from a dietary condition, whereas; over-eating beta-carotene, such as carrots, pumpkin, dietary supplements/ vitamins high in this souce, can cause this. Other causes can stem from peripheral vascular disease, conditions that cause damage or circulatory issues to the small arteries going to that finger, hand, toe, foot, etc. Because this can be stemming from something very minor, to something which may require further testing to diagnose properly, I would suggest that you have this area checked by your physician. He/she could better examine and determine if this requires treatment.
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