‘Uniboob’ is a real medical condition — who’s likely to get it
Symmastia, commonly known as 'uniboob,' is a rare medical condition where the breasts merge in the center of the chest, either from birth or as a complication of breast surgery. While not life-threatening, it can cause physical discomfort and emotional distress due to its impact on body image. Treatment options include specialized bras, surgery, or corrective procedures depending on the severity and cause.
- ▪Symmastia is a condition where the breasts fuse together in the center of the chest, resulting in little to no cleavage.
- ▪It can be congenital, present from birth, or acquired as a complication following breast augmentation or reconstructive surgery.
- ▪Risk factors for acquired symmastia include overly large implants, improper surgical technique, or pre-existing chest wall conditions like pectus excavatum.
- ▪Though not dangerous to physical health, symmastia can lead to skin irritation and significant emotional or psychological challenges.
- ▪English TV personality Charlotte Crosby has spoken publicly about living with congenital symmastia and the social stigma she has faced.
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Women's Health ‘Uniboob’ is a real medical condition — who’s likely to get it By McKenzie Beard Published May 16, 2026, 1:14 p.m. ET For some, the dreaded “uniboob” isn’t just a side effect of a too-tight sports bra or a fashion mishap that resolves once you get home. In rare cases, it’s a real medical condition that can alter the natural shape of the chest, sometimes merging what are typically two distinct breasts into a single, continuous mound. Here’s everything you need to know about symmastia. 5 Symmastia is a rare medical condition that causes the breasts to merge together in the center of the chest.
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