welcome to HealthcareMagic
If you have increase in weight like a kilo then probably this is not because of retention of water and you may be having problem with your thyroid
.Increase in weight;tiredness;hair fall;depression
are few symptoms of hypothyroid.So please get the thyroid test T3;T4;TSH
done and if that is normal then you can get treated for water retention and if the thyroid is a problem then you have to get treated for that.