Have only one blood shot eye on and off for a month, dr says allergy or virus and gave drops, but I feel like I should be more concerned?
Several possible. Several possible causes. A recurrent red eye is commonly due to dryness, a vascular disorder (hypertension), allergy or too much Aspirin or Aspirin products (ecotrin, alleve etc.). Your blood pressure should be monitored and controlled if elevated. You should avoid visine (gets the red out version) and use artificial tears instead (visine also makes a brand of this). See an eyemd if persistent.