What symptoms does Henry show?

Henry comes back from the war a different man. While before he was talkative and full of fun energy, now he spends most of his time alone and quiet. Also, he is restless and jumpy. These changes in Henry’s character are described by the narrator of the story, who is also Henry’s baby brother, Lyman. In fact, Henry changes so much that his family worries about his state of mind. They think that he should see a doctor, but are not decided about what medical facility they should take him to, as the reservation does not have Native American doctors.
The story starts with a description, given by Lyman, of Henry’s life before he left for the war. From this description, the reader learns that Henry was a normal, easygoing Native American man who loved to have fun. For instance, when Lyman and Henry see a red convertible during a trip in town, the brothers decide to use up all their savings, which they’ve carried with them, to purchase the car. Afterward, the two take trips to all kinds of places in the car and have lots of fun too. The Henry after the war rarely laughs, and when he does, it “sounds more like he is choking.” He is strung up and cannot relax no matter how much he tries to. A description is given of how he sits on his chair: “he sits in his chair, gripping the armrests with all his might as if the chair itself is moving at a high speed.” Since Lyman remembers how much his brother loved the car, he tries to use it to “bring back the old Henry.” However, his trick fails, as he loses his brother in the end.