Pimples Mod  

When your Sims are standing in front of the sink* in the morning, they might notice something odd: pimples! Teenagers (and on rare occasions older Sims as well) can get pimples with this mod. They are assigned a hidden moodlet which will last for a maximum of 24 hours. The time can be reduced if you do anti-stress activities (like yoga, shower). Sims will get pimples randomly, and based on their traits they will either be less ore more prone to get pimples. Some Sims might even suffer from severe acne, while Sims with the reward trait "great kisser" will never get acne, so buy this reward trait if you want to spare some Sims.

Also based on their traits (and some randomness), Sims will get a 2 hour lasting embarrassed moodlet when they notice the pimples. Other Sims will not be affected by pimples that much.

Your Sims can get rid of their pimples by taking medicine, herbal remedies (deodorant) or a cup of green tea resp. Lemon Honey Ginger tea. Their parents might also chose to share detoxation secrets with them or help them to relax (the latter interaction will only remove the embarassed moodlet, though). Gussy up at the mirror might also help if your Sim is lucky.

Sims who are relaxed and well kept will not get pimples. So share relaxing techniques will also help your Sims to provide for not getting pimples.
*I linked the moodlets of this mod to the wash hands interaction, so this mod will be incompatible with "nowashhands"-mods. It will also not work if you are cheating to keep your Sims´ motives permanently high.