At the risk of stating the obvious, if you are in doubt then do seek medical advice. Tomato skins are one possible source but there are other red-tinted foods that could be responsible.
Rectal bleeding can include "free flowing blood", minor bleeding (such as haemorrhoids) or semi-solidified blood lumps/streaks buried in - or on the surface of - your motions.
Don't let the matter drift if you continue to be concerned.
regards
Morecambe
well i dont know if im suffering from rectal bleeding.? i hadnt eaten any tomatos ?
If red matter is contained in your motions then the source is most likely to originate from either undigested food (e.g. tomato skins etc) or from blood. If indeed you are suffering from rectal bleeding then do seek medical advice since this is not normal.
regards
Morecambe