Lymphangioleiomyomatosis (LAM) is a rare lung disease that almost only affects women. Smooth-muscle cells grow in the lung walls and lymph channels, slowly blocking airflow and fluid drainage.

Shortness of breath is the star. You puff climbing one flight of stairs or can’t finish a sentence while walking.

Chest pain or tightness shows up. It feels like a band around the ribs and gets worse with deep breaths.

Cough is dry and persistent. It doesn’t bring up mucus and is worse at night or with activity.

Pneumothorax pops up early. A sudden sharp pain and breathlessness mean a lung has collapsed—often the first real alarm.

Swelling in the belly or legs happens when lymph fluid backs up. Pants feel tighter and socks leave deep marks.

Late signs include bloody sputum, weight loss, or constant fatigue—an alarm that the lungs are badly scarred.