Anyway, my suggestion (as horrible as it might be) is to ignore the behavior. At 11 months old, she's probably quite aware that this behavior gets a reaction out of you and enjoys getting what she wants by doing it (you take her out of the high chair to clean her off, remove her from the bed to change the sheets, etc).
When our daughter gets carsick, we used to remove her from the seat to clean up. Soon a negative association was made with the car. She would anticipate it, fight getting in (then fight to get back out when she does throw up) and scream the WHOLE drive. There was even a point where I thought she might be making it happen just so we'd stop the car and let her out. Once we started to not make a big deal out of it (we would just say "Oh, yucky! You threw up! Let's get you cleaned up so we can keep going", but not remove her from the seat and then keep on driving - we can clean up better later), leaving the house because much less of a big deal. Now when she gets sick, she shows us her hands, says "ucky", and we clean her up and off we go. She still fights to be put in the carseat, but once she's in, she's fine.
I'm not really too sure what else to suggest to you. Don't make a big deal out of it, clean her up as best you can without giving her what she wants (or keep little containers near by she she doesn't make a mess), and she'll soon learn that this behavior isn't going to get her a reaction.
I'd love to hear what others say about this. I'm sure there's a better way, but it's such a phobia of mine that I honestly don't know how to deal with it in any other way than by use of extinction.
This was over 10 years ago, so maybe things have changed, but the ped said to basically ignore it as much as possible. Just bring her a little bowl to do it in, don't make a big deal about it. My niece had a little bucket reserved for that purpose and as she got older, my sister would just tell her to go get her bucket when she started making the motions.
They outgrow this luckily, by about age 4. Some valve in the esophagus is not fully developed and once it is, they can't barf on demand anymore.
I would put cloth diapers or receiving blankets or something under her in bed to make it easier to clean up, and therefore easier on you. Otherwise, I don't think there's much you can do with an 11-month-old in a situation like this.
I used to have a HUGE phobia of throw-up/throwing-up...Kids have nearly cured me
DH&Me Christ follower, homeschooler, gardener, (insert lots of additional crunchiness here) chicken mama, & occasionally blogger. Mama of boys 9,7,3.5,&11months....& SURPRISE expecting a BOY in November! 7 sweet-babes gone too soon.
The past week or so my 11 month old has been vomiting at night, when I'm nursing her down. We co sleep too. At first I thought she might have a stomach virus. But I'm beginning to suspect that she is making herself vomit, because she doesn't want to go to bed just yet. She is always ecstatic to get out of bed, have her jammies taken off (she loves being naked) and play a little while longer while I readjust the bed. Ever since she's eaten solid foods she has done things like regurgitate her food. She has the control, I believe to vomit if she wanted to. We went to see a doctor last week because she had this cold that would not stop. The doctor told me she was on the upswing, but that she was having a sore throat. I wonder if the vomiting, or forced vomiting let say, is due to her throat sensitivity? No matter what it is, I am sick of washing our bedding every day. And it worries me, because she is loosing the nutrients she could be getting from the cereal and breast milk she pukes up all over me every night. I am going to take the suggestion I read here, about putting down receiving blankets, to make it easier to clean up. And maybe I'll keep her up a little bit longer, assuming she doesn't want to go to bed because she isn't ready. I sure hope this phase passes fast.
My 13 month old recently started sticking the mallet to his xylophone in his mouth until he gags, and laughing hysterically. There was one morning that my mom randomly made a gag sound, he laughed, and she kept doing it because he thought it was so funny. That afternoon he started the play-gagging. He's never made himself throw up, but he will have red eyes and tears streaming down his face, and still think it's funny. I just try not to react to it and reinforce the game.
I guess I'd just be prepared with a blanket or towel under you in bed...I mean, I personally wouldn't have a problem giving her what she's asking for (letting her down from her chair, getting out of bed to continue playing, then trying bed again in half an hour)...I'm assuming that at 11 months she's non-verbal, and at that stage they have to get creative on how to get their point across. My son lets us know he's done eating and wants down by throwing all of his food on the ground. No biggie, the dog cleans it up, and I know he's finished. Just because she's found a way to "get what she wants" doesn't mean that she's intentionally manipulating you or that you shouldn't "give in" to her. So I guess what I would do is when she starts, try to figure out what she needs before it escalates to actual vomiting. Distractions work fairly well for us also.