Will breasts feel hard when lying flat on my back after a BA?

Joi.  Most breast augmentations performed by board-certified plastic surgeons look extremely natural  standing up or laying down. However, very large implants can look less natural. Discuss your concerns with a board-certified plastic surgeon in your area. Good luck.

Dear Joi00000,there is a chance that implants will feel hard during the early recovery stage but later they should become more natural. The different types of implant offer different pros and cons. For instance, the pros of silicone implants are that they look and feel more natural and ripple less.
If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

The use of silicone implants and sub pectoral placement of the implants helps to create a very natural feel.#StayBeautiful #RealDrWorldWide

I don't think your breasts will feel firm to you in any position. The newer, highly cohesive gel implants are soft and feel more natural. The most common type of implant that I use is called a "soft touch" implant that feels great! Good luck!

It is very common for the implants to feel hard and tense during the early postoperative period. Eventually they descend and feel softer and it may take several months for this to occur. It is recommended that you follow with your surgeon for evaluation.

at the beginning all breast augmentations will feel hard and fake ...as the weeks and months go by this naturally softens. The end result will depend on the size of implant chosen v the amount of native tissue. Choose wisely and you will be happier longer .
Nilesh Sojitra 

Good question. Much of the final look and feel achieved after breast augmentation surgery depends on several factors:
1. The initial shape, size (volume of breast tissue), symmetry of the patient's breasts. In general, the better the preoperative breast appearance the more likely the breast augmentation “look” will be optimal (barring complications such as encapsulation). 
2. The experience/skill level of the surgeon is important in determining the final outcome. For example, the accurate and gentle dissection of the breast implant pockets are critical in producing long-term well-placed breast implants. I personally think that these 2 factors are more important than any others, including type (saline or silicone) or model (low/moderate/high profile) of implant.
3. The type of implant used may determine the final outcome, especially if the patient does not have significant covering breast or adipose tissue. For example, some surgeons feel that silicone implants have a more natural look and feel than saline implants because silicone gel has a texture that is similar to breast tissue. In other words, if a patient has very low body fat and/or very little breast tissue, the silicone gel implants may provide a more "natural" result. All FDA approved breast implants utilized today are cohesive gel silicone breast implants;  some are firmer than others (including the true "gummy bear" breast implants).  I find that I use round smooth silicone gel breast implants for the vast majority of patients who seek breast augmentation surgery (looking for a natural look and feel).
4. The size and model of breast implant used may make a significant difference in the final outcome. Therefore, it is very important to communicate your size goals with your surgeon. In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as “natural” or “C or D cup” etc may mean different things to different people. 
Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup size may also be inaccurate.
  To summarize: select your plastic surgeon carefully. Communicate your goals carefully as well.  Chances are you will be very pleased with the outcome of breast augmentation surgery. 
I hope this helps. Best wishes. 

The best result after breast augmentation is a natural looking natural feeling breast with an implant that moves softly and smoothly with your body. A hard sensation occurs when you develop the complication called a capsular contracture or when extremely large, too large breast implants are used. Find an experienced board certified plastic surgeon and discuss your concerns during your consultation.

if you don't go too large, if you select silicone and you go under the muscle, there is no reason why your implants should look or feel fake, when you lie on your back. Of course, it takes time after your surgery for things to get softer and for them to settle into place. For the first year at least, things will get softer and more and more natural looking. david berman md