My baby gain weight only but doesn,t muscles what can i do for him?

Keep breastfeeding your baby.. that’s best for baby

Understanding Baby Weight Gain

But i dont do that

Because my nipple is abnormal

Dealing With Flat And Inverted Nipples

But he cant sucking

Then u should express and feed him till he can. Use a manual pump or electric pump but Breastmilk is the best way.