Hi and welcome to the forum! I am glad to help you.
You would like to know the symptoms and signs of blocked arteries.
Pain during walking or at rest is present in both arterial or veinal blockage. In arterial blockage the leg or arm is white and cold even if you stay in warm areas for a long time. There is no pulse in the leg or arm depending on which artery is blocked. If the veins are blocked there are two conditions: phlegmasia alba dolens (the leg is pale and cool with a diminished arterial pulse due to spasm) and phlegmasia cerulea dolens (the leg is usually painful, cyanosed and swollen). Smoking causes the arteries to contract and reduce the blood flow in limbs, provoking pain.
Given the symptoms that you described, it is likely that you may be experiencing arterial blockage in your leg probably due to atherosclerosis or thrombus. Consider seeing a vascular surgeon immediately and have an ultrasound Doppler exam. You might want to have surgery to prevent gangrene.
Please keep in mind that I provide medical information only. I am not able to diagnose medical conditions online. Please contact your doctor or other qualified healthcare provider such as a vascular surgeon immediately for further advice and information about diagnosis and treatment options.