PMC9537696_01
Severe hyperhidrosis of the left body and arm suddenly occurred several times every day mainly at night. The patient's left body and arm were suddenly covered in large beads of sweat. To the contrary, his face, neck, right body, and other limbs remained dry and sweat-free. After immunotherapy, the frequency of hyperhidrosis decreased markedly with such events occurring a total of two times in the 6 months after discharge.
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He would suddenly wake during the night and find that the clothes on the left side of his body and left arm were completely soaked with sweat, whereas the naked parts of the left side of his body and arm were covered with large beads of sweat; however, the right side of his body and other limbs were dry and sweat-free ( Figure 1 ; Supplementary Figure 1).