Bright green poo

[Fingerbobs]

in my 20wk DS (pfb, natch). And I mean bright green, like this colour . And then some diarrhoea, just a bit and brown rather than green but v watery and frothy (sorry if TMI but you did click a thread called bright green poo so....)
He's having some trouble with teeth I think, and I've got a cold coming and he's been sneezing a fair bit. How long before I should worry about dehydration? The diarrhoea was at 6pm and he's asleep now - likely to wake around 9-10pm. He was hospitalised with dehydration when 4 days old so am v. v. paranoid about this.

Hiya...
is he breastfed or formula fed (sorry dont know what pfb and natch is!!..v sleep deprived!)

Sometimes if breastfed babies have green frothy poo then its too much foremilk...but at 20wks I dont think too much foremilk would really bother his tummy that much.
I took my dd to the dr when she had an awful cold and also runny green frothy poo, and dr said that the milk wasnt being digested properly and probably because of her cold. Dd is breastfed, but I think the same would probably be true with formula. If youre worried though just give nhs direct a ring...they can tell you what to look out for with dehydration.
hth!

Thanks very much mumof2pixies - he's breastfed, and like you I didn't think it could possibly be foremilk by now. I'll wait and see how it looks at 10.

(pfb is precious first born and natch is just short for naturally)

The title caught my eye! This may well be irrelevant but my son had rotavirus at 18 months - one of the dramatic symptoms was pea soup poo, and what seemed to be pints of it.... He did get dehydrated and spent a couple of nights in hospital. I had never heard of it before but apparently it's really common, particularly in the very young. May be worth looking it up and bearing it in mind. Fingers crossed for you both!

Thanks hotpasty - thank goodness it's not pints (how exorcist) but I'll bear it in mind.

DS used to get bright green poo when sickening for something at that age - keep an eye, but prob not too much to worry about.

A couple of months and you'll have to contend with "weaning" poo - now htat really is revolting