What is your height and weight. How long back u had baby.still feeding baby. Back pain is common after cersarian.I can help with 4-5 KGS weight loss in month that too fat not muscle.

Weight gain happens either due to addition of extra calories or due to failure to spend calories consumed...these extra calories deposited in our body as fat..for weight reduction you have to consume less calories and spend more...avoid junk foods,carbohydrates like rice etc,avoid oily foods...add proteins and fibre rich foods to your diet with green tea,green leafy vegetables, fruits...do regular exercise at least 2 hours a day...Consult dietitian they will do the needful.