Good - I have solid textbook information now. Let me give you a thorough answer.
Based on your profile - under 30, female, brief squeezing episodes (seconds), very infrequent (once or twice a year), not triggered by exertion, no associated symptoms - this is actually a fairly reassuring picture. Here's what fits best:
Most Likely Causes
1. Precordial Catch Syndrome (Texidor's Twinge) - Most Likely
This is the top candidate for you. It is a very common, benign condition in young people. As described in
Tintinalli's Emergency Medicine, it causes:
- Short, sharp/squeezing pain near the left side of the chest (near the heart)
- Lasts seconds to 1-2 minutes
- Not linked to exertion
- No shortness of breath, no other symptoms
- Associated with sitting still or poor posture
- Completely harmless - no long-term consequences
It is often worsened by taking a deep breath. Many young people describe it as "took my breath away." It tends to happen very sporadically, which fits your "once or twice a year" pattern perfectly. - Rosen's Emergency Medicine, p. 3203; Tintinalli's Emergency Medicine
2. Esophageal Spasm
The esophagus runs right behind the heart. A sudden spasm can feel like a tight, squeezing sensation in the chest that lasts seconds. It can be triggered by stress, certain foods, or nothing in particular. This is also benign in most cases. - Tintinalli's Emergency Medicine
3. Costochondritis (Tietze's Syndrome)
Inflammation of the cartilage where your ribs meet the breastbone. Can feel like a squeezing or dull ache in the chest. Reproducible by pressing on the chest. Usually harmless. - Washington Manual of Medical Therapeutics
4. Anxiety / Panic (Low likelihood given your description)
Panic episodes can cause chest tightness, but they typically come with other symptoms (racing heart, sweating, fear). You have none of those, so this is less likely.
What Makes This Reassuring
Your pattern is actually quite low-risk because:
- You are young and female (low cardiac risk)
- Episodes last only seconds (true cardiac ischemia typically lasts longer - 5+ minutes)
- Not triggered by exercise (exertional pain is the red flag)
- No spreading pain to the arm, jaw, or back
- No sweating, shortness of breath, or dizziness
- Very infrequent (months between episodes)
When You SHOULD See a Doctor
Despite the reassuring picture, do get checked out if:
- An episode lasts more than a few minutes
- Pain starts happening with exercise or physical effort
- You develop shortness of breath, dizziness, or fainting
- The episodes become more frequent
- You have a family history of heart disease at a young age
A basic check (ECG, physical exam) would be reasonable to do once just to confirm everything is normal - not because it's likely serious, but just for peace of mind.
Bottom line: What you're describing sounds very much like precordial catch syndrome - a completely benign, common condition in young people that can feel alarming but is harmless. The infrequency, brief duration, and lack of any associated symptoms are all reassuring. That said, I'm an AI and not a substitute for a proper medical evaluation - a quick visit to your doctor for a baseline check is always a good idea.