1 Infection: Blood in the urine can be a sign of urinary tract infection (UTI). An infection can be present in the lower urinary tract (bladder and urethra) or higher in the urinary tract (kidneys or ureters).  Nephrolithiasis: Kidney or bladder stones may form inside the urinary tract and can cause bleeding into the urine.
From 12 November 2015, however, if a person with at least 12 months of permanent residence wishes to apply for British citizenship he or she first has to apply for a permanent residence certificate or card. This change was introduced by the British Nationality (General) (Amendment No. 3) Regulations 2015 (SI 2015/1806).
The more common form of Form I 551 is the permanent green card. Permanent residency with a permanent green card allows you to stay in the United States and work in the United States indefinitely. You will need to renew your green card every 10 years, as it expires, but your Form I-551 status will remain permanent.