"i switched to yaz from alesse because i heard it was better for acne. it did wonders for my skin and only having a 4 day period was nice too. however, i did notice that i was more emotional and had crazy mood swings, i found myself crying for no reason (not very good for my relationship either). i didn&#039;t gain any weight, and had no other side effects. i only switched back to alesse because my doctor expressed a concern about the blood clots possible with this birth control, otherwise i wouldn&#039;t have switched. goodluck!!"