Well, a lot of things, according to Marnie Nussbaum, MD, a board-certified dermatologist in New York City. Apparently, there are a lot of in-isolation factors at play, and even though quarantine has eliminated a lot of skin stressors (Pollution! Sun damage! Makeup!), there are newfound reasons that could be making your skin patchier or bumpier. But we’re not just here to lament over our skin grievances—we consulted with Dr. Nussbaum to decode all the reasons why your skin may be freaking out (and how to get a handle on it). The solution: Try to get some fresh air outside whenever possible (while still practicing social distancing!). This can mean taking a walk outside, getting some gardening done, or even just standing out on your balcony for a few minutes. Eating right can also help, adds Dr. Nussbaum: “As long as you’re eating a variety of fruits and vegetables and maintaining a well-balanced diet, your vitamin D levels should stay within normal limits. If you do suspect a vitamin D deficiency, always inquire with your primary physician before starting supplements.” The solution: For starters, invest in a good humidifier to hike up the moisture levels in your house. “Just as your skin is changing, your skincare regimen must change as well to target your new skin concerns,” adds Dr. Nussbaum. No matter what your skin type (even if you’re oily!), good skincare is key—transition to thicker serums and moisturizers containing antioxidants and hyaluronic acid. The solution: Just because your daily schedule has changed doesn’t mean that it can’t have order. Try implementing a new normal that mimics your usual routine, like waking up at a set time and getting ready for the day even if you aren’t going anywhere. This will make it easier to head to bed when you should—remember, seven to nine hours of sleep is the goal! You may also be drinking more than usual right about now (noon is the new happy hour, am I right?). Unfortunately, increased alcohol consumption can increase dehydration levels, sparking inflammation, puffiness, and redness due to dilated blood vessels. The solution: Although cheap, processed foods are an easy out, they’re usually packed with unhealthy ingredients, such as hydrogenated fats, artificial colors or preservatives, and added sugars, that take a toll on skin. It’s best to limit your consumption of alcohol (to no more than two glasses) and unhealthy junk food as much as possible. If you’re having trouble getting yourself to cook every night, try a healthy meal subscription service, like Blue Apron, that includes pre-portioned, healthy ingredients you’ll need for each meal. You can also swap out every other happy hour for a yummy mocktail recipe. The solution: I know—reducing stress is easier said than done. Try meditation apps, yoga, or even just listening to music to quell your mind. In order to treat stress acne, Dr. Nussbaum recommends a gel-based cleanser containing salicylic acid or fruit enzymes (mild exfoliants) twice daily to remove any excess oils, dirt, and dead skin cells. Retinoids can also help. “SkinBetter Science has a great one, AlphaRet Overnight Cream ($125; skinbetter.com), which is a fantastic multitasker,” says Dr. Nussbaum. “It contains encapsulated retinol (less irritating than traditional retinols), alpha-hydroxy acid for mild exfoliation, niacinamide to reduce redness, and ceramides and hyaluronic acid for hydration.” RELATED: How to Start Meditating at Home for a Quieter Mind