My Husband Had A Stroke 8 Years Ago And Has

My husband had a stroke 8 years ago and has been on blood thinners since. We took him off the blood thinner for 7 days so he could have all his teeth pulled and dentures. The teeth were pulled 5 days ago and we re going to start the blood thinner again tomorrow. However, his feet has swollen and turned a greenish blue. Should I check this out?