My left calf feels tight and both of them swell during the day, what could be causing this? its been a ongoing problem. i do exercise at the gym.

Calf issues: Could be edema making them tight and swell. Other possibilities are always a blood clot/ or phlebitis, etc. Get an eval since you appear health, and exercise regularly, yet you are still getting swelling and tightness. best wishes.

See below: If the left calf tightness is new, you should have it evaluated ASAP. If it is ongoing, along with the swelling of both legs, it may be related to venous insufficiency(which can cause swelling/cramping/tiredness/heaviness of legs).Tightness can also be due to muscle strain with local swelling. Other causes of swelling can include lymphatic issues, medications,ambient temperatures,dietary salt +