Is It Normal to Have Skin Hang Like This After a Tummy Tuck when Laying Down on Your Side? (photo)

Without before pictures, it is impossible to comment on your results specifically.  Based on your after pictures,  see extensive stretch marks indicating that you have lost much of the elasticity of your skin.  So, no matter how thight your surgery pulls your skin, it will not be the same as someone with better elasticity.  Secondly, it is exceedingly rare not to have to do a muscle / diastasis repair during tummy tuck.  While the recovery may be faster, if there is any looseness to the muscle, you abdomen will never be as flat as it could be with the muscle repair.

 

Good Luck.

You appear to have a very nice tummy tuck result.  Without the benefit of pre-op pics I cannot comment fully on this though.  The laxity when on your side is likely because your innate skin quality is still somewhat poor unfortunately.

Congratulations on an excellent looking abdominoplasty.  Tightening the abdominal musculature would have had very little influence on whether your abdomen bulges out when you lie flat and lean to the side.  This side bulge may be due to excess skin, fat or just swelling.  You didn't mention if you had liposuction of the flanks or not. 

It does not appear that you needed an extended tummy tuck, therefore I don't feel that you had excess skin, and therefore there may be some residual fat or swelling.  Only time will tell.  Give yourself another 4-5 months, and if this side bulge still bothers you, then perhaps liposuction may be the curative modality.