Please do not worry, cancer bleeding is very unlikely in what you have described. True bleeding from the stomach (melena) is jet black, sticky, tarry and foul smelling, it usually continues over several motions, and it comes with weakness, giddiness, palpitations or paleness. Your episode was a small amount of dark stool for one or two motions, the stool turned normal on its own from the very next day, and you have felt otherwise well, which fits far better with a food or constipation related colour change. Dark green leafy food, chocolate, beetroot, jaggery, black tea, bismuth or charcoal preparations, and stool that has stayed long in the bowel during constipation can all look blackish. Since you had gone almost a day and a half without passing motion, that hard dark stool is quite explainable. Keep your water intake at 3 litres, take fibre in the form of fruit, vegetables and psyllium husk at night, and avoid straining. For your peace of mind it is reasonable to get a simple stool occult blood test and a CBC to check haemoglobin; if both are normal, no further testing is needed. If the black tarry stool comes back, or you notice vomiting of blood or coffee ground material, fresh red blood, weakness, giddiness, weight loss, loss of appetite, difficulty swallowing or persistent upper abdominal pain, then please see a doctor promptly as an endoscopy would be indicated. Also avoid painkillers like ibuprofen or diclofenac and alcohol, as they irritate the stomach lining. Happy to review this with you on a consult here (fee Rs 500) if you wish.

kindly do connect and consult with me for better treatment plan and advice on your case via PRACTO app

?????? Dates n stool very  confusing Black stool Adv Stool test Complete n microscopic  with test for ocult blood.

Please share if you have chronic constipation, stools were just little dark colored or black like coal tar. Connect online with details.  Then I can help you further.

GI bleeding cannot be ruled out online please consult a Gastroenterologist  for assessment given the episode of black stool, urgent review if black stools recur or there is dizziness, weakness, vomiting blood, or abdominal pain.

Can help you, kindly consult and provide detailed history for proper diagnosis and further management

See if black stools are recurring .do a stool occult blood test and see gastroenterologist if black stools repeat and do endoscopy

Bleeding. Kindly consult with me on 94 two six eight six 78 nine six.

Need a few more details please consult for further evaluation and treatment

Avoid fried and spicy food Water intake more Green leafy vegetables more Fiber meal Walk Do connect and consult Will help you