First, as I noticed this is a semi-autobiographical story, I give you my deep condolences of the possibility of your closest person or even yourself went through this kind of pain....
Shrinking Pains brings a well-written point of view struggling with an Eating Disorder, which as its title hinted and the category of the probem : it is slowly "eating" the characters away from their lives, and a reminder to the importance of emotional support. The greyish tone and sketch-style graphics also amplify the distress of the characters, and an implication of the suffering they feels daily (like a "sketch" , writen and erased in every steps of completing the picture).