what causes redness, rash, swelling in lower legs
DVT or Phlebitis: This can be a very dangerous situation. If the redness and swelling includes your calves then you need to seek immediate emergency medical care. If the rash and sores are just in the front of the lower legs this could be phlebitis. In either case you need medical attention.
Also bumps are not itching anymore, now they are dry bumps. Allergic reaction: Usually rashes on the top of your feet are casued by some type of allergic reaction or contact dermatits. With your lower legs involved i would rule out edema/swelling as an issue as well.