Seam puckering

Troubleshooting and sewing defects
Unwanted wrinkling or distortion of material along or beside a seam.
Also known as
Seam pucker
Not to be confused with Several mechanisms exist: tension, feed and shrinkage puckering.
Translations
DE Nahtkräuseln
FR Fronçage de couture
ES Fruncido de la costura
IT Arricciatura della cucitura
CN 接缝起皱
VN Nhăn đường may