Diarrhoea
You can give blood 14 days after you are fully recovered from gastroenteritis.
You cannot give blood if you have Ulcerative Colitis or Crohn’s disease.
You can give blood if you have Irritable Bowel Syndrome if you are well and have no symptoms on the day of donation.
You cannot give blood if the cause of the diarrhoea is unknown and you are undergoing investigations.