Spiritual overstuffing

Not everything that can be found in the world after the Curtain fell is safe to eat. With a lot of different spirits inhabiting the world nowadays, some of them can infect or possess the food with their presence. Consuming a food affected in such a way can quickly lead to becoming a host for spirits or, worse, permanent possession.  

Prevention

The easiest way to prevent oneself from getting afflicted by this condition is not to eat any food infected by spirits. There are many ways to both detect if the food was affected and to cleanse it, one of the easiest ones being using a purifying salt on any unknown piece of food before trying it, placing a piece of silver on the dish for a few moments, prayers, and any rites known for purifying things, or using devices capable of detecting the presence of the spirit inside the food.  

Symptoms

Immediate symptoms

As soon as one tastes the infected food, they start to feel an almost irresistible urge to finish it, no matter the amount. This, by itself, can lead to many complications, but its main purpose is to maximize the chance of infection. If interrupted, the affected person will grow irritable and might react with aggression towards the ones preventing them from consuming the rest of the dish.  

Early stage

Shortly after infection, the sick one's body might show the signs of bloating or markings related to the infecting spirit. This manifestation can cover the entire body or just parts of it. This symptom grows with time and can become painful or hinder one's movement. At some point, it is possible to hear sounds related to the spirit coming from underneath the skin.  

Late stage

With enough time without curing the affliction, the symptoms will vary depending on whether the condition is related to possession or being a host for spirits. In case of possession, more and more of one's body will become affected by the spirit and will start to take on the features of said spirit, the human slowly losing control over the changed parts. In case of becoming the host, the bloating increases in size. Additionally, it might change to become a suitable nest for the spirit that will inhabit it, and some parts of it might start to grow out of it. At the final stage of that, the host can turn completely into a nest, be partially mobile and somewhat sentient, or they can burst, releasing the spirit or multiple of its smaller forms.