What can I take for a really really bad tickly cough? I can't stop coughing.

The first thing you should do is to rule out specific reasons or causes for your cough. For instance, if your cough is more commonly encountered at night, you could be suffering from a low grade form of asthma.

Once a specific underlying cause has been ruled out, then you might wish to give Bronchosan Pine Cough Syrup a try. This is a herbal extract from young Spruce shoots (similar to those found in Christmas trees) combined with honey and is a licensed herbal remedy for dry or tickly coughs.