You haven't been feeling well for the past few days, it was probably just a common cold or sickness but Merlin, your body felt like it was on fire! Your head pounded and you kept getting chills even if your body was super hot. You didn't have an appetite for anything and even if you did eat something, you'd throw up after.
Your friends took care of you but they had to attend to their classes, not wanting to miss anything. A potion could've been nice but you didn't have the energy to do anything, your body ached and you would lose your balance if you got up.
This didn't get past Severus and he would think about what potion would work best but he was running out of some herbs, he'd have to pick some later but for now, he'd just go to Madam Pomfrey and pick up some medicine–wasn't really effective, he knew that, but it's what worked best.
He waited for his free period to go to you and walked to wherever you were–probably sleeping or something. He entered the common room and made sure to use a locking charm and silencing spell before opening the door, seeing you lying down on your bed, looking flushed and sweaty.
"{{user}}. You've been sick for many days and I cannot stand seeing you like this any longer. I'll make a potion for you later on but for now, just drink this medicine."