Possible Tb?

[topshot]

hi. my platty (boo) over the last 3-4wks has changed shape , she has lost weight and looks like she is "sucked in" just behind her head. she is still active and feeding well.she just looks wierd. at first i thought the weight loss was due to her giving birth but it has got worse over time. ive read the a-z and it sounds like tb!!! help please. she is a year old and my first home bred platty so she means alot.
thanks

 

[Nikai]

If it is TB there's not really much you can do for her...But you should seperate her from the other fish and sterilise the tank as it is contagious....check this site to see if it sounds like what your fish has Fish diseases
Good Luck with your fish , just hope it's not TB as it is a horrible disease

 

[WILDER]

Can also be internal parasites.
What does it look like when the fish goes to the toilet.
Is the anus of the fish enlarged or red and inflamed.
Also losing weight can be flukes and old age.