Medical conditions that might make it difficult for someone to wear a bra:

1. Mastectomy: After a mastectomy, scarring and sensitive skin may make it difficult to wear a bra.
2. Back problems: If you have back problems or chronic pain, a bra with too much weight or pressure on the shoulders and back may be uncomfortable.
3. Sensitive skin: If you have sensitive skin or allergies, certain materials or styles of bras may cause irritation or allergic reactions.
4. Lymphedema: Lymphedema, a condition that causes swelling in the arms or breasts, may make it difficult to find a bra that fits comfortably.
5. Arthritis: Arthritis or other conditions that cause joint pain or stiffness may make it difficult to fasten or adjust a bra.
6. Neurological conditions: Neurological conditions such as Parkinson’s disease or multiple sclerosis may affect fine motor skills, making it difficult to fasten or adjust a bra.
7. Surgery: After certain types of surgery, it may be difficult or uncomfortable to wear a bra due to swelling or sensitivity.

Remember, it is important to consult with a medical professional if you are experiencing any difficulties with wearing a bra. They can advise you on the best course of action and may be able to recommend specific bras or adaptations to make wearing a bra more comfortable.