Hello

Thanks for the query

The most common causes for nose bleeds are
1. Trauma including picking of nose and common cold
2. Hypertension
3. Infections
4. Bleeding disorders
5. Change in altitudes

Low carb diet should not cause nose bleeds. I would advise you to pinch your nose for a while to stop the nose bleed. Please see a Ent surgeon for further evaluation of the nose bleed. There is nothing to worry, we see many idiopathic nose bleeds which subsides on its own in our daily practice.

I hope I have answered your query, if you have no further ones please accept my answer

I wish you a speedy recovery

Regards

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