I gained 10 pounds in a week !

are you drinking enough water

Most of that weight is probably due to water retention which can be caused by a number of factors and how accurately you weighed yourself. It would probably be best to reevaluate your calorie goal though and make sure you are in a calorie deficit.

The best way to lose 30 pounds by December is to be in a reasonable calorie deficit (250-500 calorie deficit).

The best way to lose weight by December is to create a calorie deficit and stick to it.

On the other note... There is 26 weeks till Xmas so you need bit over 1 lbs loss per week to achieve it... weight loss isn't linear so it's difficult to know for sure...but it seems that you could maybe get there with maintaining about 600-700 kcal deficit from your TDEE (which will get lower with weight loss). The way you achieve weight loss is up to you. There is no miracle thing that 'works'. However calorie deficit works 10 out of 10 times.

OP:

Some ideas for you:

Is it close to your time of the month, OP? I know several women who see that kind of increase on the scale, for that reason alone. I usually get about 2 or 3 extra pounds myself. It isn't fat gain, so it usually goes away in about a week or so.

I can gain really, really fast. But here's the thing--I may pig out for a whole week, get on the scale and have gained only a couple of pounds. So I think, Oh! I'm home free. Then the NEXT week, after a week of staying in my deficient, I may see a big GAIN. It seems to take a while to "catch up" with me. Maybe you are the same.

@diannethegeek posted this in another thread.

An incomplete list of things that can cause scale fluctuations:
Constipation
Recent increase in exercise
Recent increase in sodium
Recent increase in carbs
Recent increase in food volume
Weighing in later in the day
Weighing with different clothes/shoes on than normal
An inaccurate or uncalibrated scale
Stress
Dehydration
Ovulation
Menstruation
Puberty

Remember, it could be a combination of excess calorie consumption and one of the above. If you aren't already counting calories, think about starting and also think about getting a food scale if you don't already have one.

Ten pounds in one week can be indicative of a serious health problem- quite possibly renal (kidneys). That much fluid retention is NOT normal. Are you able to urinate or has your urine output decreased? It is highly unlikely that you were able to consume enough calories to gain that much weight in so little time. It's fluid. If I were you, I would definitely go to the doctor.

I gained 8 lbs overnight....right before my period hit! You could have shoved me over!!

Just water retention likely due to a sudden increase in carbs and sodium.
Friday the 10th of June I weighed 180lbs.
On the 11 and 12th it was a college reunion and I did not shy away from pizza, beer and treats.
Monday the 13th I was 188lbs.
I just ate normally.
Tuesday I was back down to 184 and Wednesday back down to 180.

jessicarobinson00 wrote: »

I gained 8 lbs overnight....right before my period hit! You could have shoved me over!!

Here's the thing: A water weight gain of around 8 lbs., as you're talking about, is the upper limit of 'normal'. It usually resolves in a day or two. When people are talking about a sudden weight gain of 10-14 lbs. in a week or two that can't be contributed to diet (i.e. consuming lots of calories), then it absolutely ISN'T normal.

People on this thread are not getting it. A weight gain like this is indicative of a health problem and it needs to be checked out. What you don't do is sit at home and think you'll be fine. Source: Working in healthcare and dealing with patients with fluid overload on a regular basis (CHF, kidney failure, et cetera).

I know more than one person that would have died had they listened to some of the advice on this thread (i.e. the you'll be fine stuff).

seachelle76 wrote: »

jessicarobinson00 wrote: »

I gained 8 lbs overnight....right before my period hit! You could have shoved me over!!

Here's the thing: A water weight gain of around 8 lbs., as you're talking about, is the upper limit of 'normal'. It usually resolves in a day or two. When people are talking about a sudden weight gain of 10-14 lbs. in a week or two that can't be contributed to diet (i.e. consuming lots of calories), then it absolutely ISN'T normal.

People on this thread are not getting it. A weight gain like this is indicative of a health problem and it needs to be checked out. What you don't do is sit at home and think you'll be fine. Source: Working in healthcare and dealing with patients with fluid overload on a regular basis (CHF, kidney failure, et cetera).

I know more than one person that would have died had they listened to some of the advice on this thread (i.e. the you'll be fine stuff).

The "you'll be fine" stuff is the most advice people can give based on their own experiences with the limited information the OP chose to give out to begin with. Recommending someone see a medical professional should not always be the first thing people recommend and even then, as we're all adults, people need to be responsible for themselves when it comes to whether or not they choose to see a medical professional. People wouldn't die by listening to the advice here; they'd die because they chose to ask the internet instead of a doctor.