My Lips Started Swelling Overnight, What Might Be The Cause?

Allergy medicine don't always work.
The same thing happened to me, but it only happens after I have a baby and I just had one three week ago I've been taking allergy meds for almost a week and it did not work, until I woke up this morning with really swollen lips and eyes. I had to go to the emergency room to get shots , it brought down the swelling but around my lips are red and cracked and its still very painful. There has to be a better treatment out there for us. I won't even leave the house I look so bad.

This problem can be due to allergic reaction caused by insect bite or medicine. For details, visit this link.