Hello again and thanks for waiting.
I have worked out an answer for you, please read it through and see what you think ...
1. I would doubt of course that this is in any way related to the previous insect bite episode. Where a dog is swallowing and licking his lips like that and is uncomfortable and is eating grass it usually because he is feeling nauseous and may be about to experience a bout of vomiting. Stop him eating grass if you can because this itself will cause nausea and vomiting.
This sort of thing can often occur where a dog has eaten something he should not have, perhaps out in the garden. Of course other diagnosis are possible ...
2. What to do about it ? : Well I have to say that this sort of thing is always a gamble, if you want to be 100% sure you are doing the right thing you should have a vet check Teddy over without delay. However some owners would try the following while waiting for their vet's appointment.
1. I am aware that some owners use the likes of Pepto-Bismol if you have any handy to treat their dogs with nausea and report success. Here is a link to a web page which has all the information you might need including dose rates : LINK
2. Some owners try and control the situation with diet alone before they try anything else. This is logical and often works, the basis of this is to give the intestinal tract a complete rest and then bring it back slowly to function, resting the alimentary tract is the critical factor. It would go something like this ...
A. Starve him for 24 hours but make sure he has access to water.
B. The next day feed him four or five small light meals in the day. These meals should be the likes of chicken, fish, scrambled egg etc. with a little rice.
C. If he picks up on this diet gradually reintroduce his normal diet over the next few days.
3. Live yogurt added to the food can often help. Some gastro-enteritis situations are caused by an imbalance in the bacteria in your dog's gut. Live yogurt is full of " good " bacteria and will seed them into your dog's intestinal tract and restore the balance.
Of course if any of the above does not quickly start to work or if Teddy deteriorates further in any way you should see your vet without delay just to be on the safe side.
I hope I have covered your question fully enough but if you would like further clarification or to talk things over a bit more then I will be on-line for the next hour or so and I will be more than pleased to continue working with you.