<s>[INST] I ve been cracking my toe (third) lately and it seems to be getting darker than the rest of my toes, like I ve a habit of trying to pop the same toe until I feel like it s better, and everytime I try to pop my toe and strain it, it gets darker. Is it bruising? I ve a weird habit. And I need to know what is causing me to get the darkness or the bruising on my (third) toe. [/INST] Hello,Welcome, and thanks for sharing your concern I went through your query, and I feel, darkness and bruising are signs of vascular problem with your limb, do not try to strain the legs, and see if it improves, if it dosent than you will need some investigations, but i would like to know, if you are a smoker and if yes since how long , and what is your frequency of smoking.I hope my advice would have been useful, in decision making regarding your treatment, still if you have any clarifications or doubts feel free to contact back.Thanks. </s>