What could cause chest pain while breathing in?

Usually pleurisy. Which is irritation of the lining of the chest cavities, usually from inflammation or infection (pneumonia) or can be from lung cancer. If persists, see your md and possibly get chest x-ray.
Pain breathing in. Inhaling involve active muscular work while exhaling is passive elasticity of thorax. Muscles work and hurt after they have been overworked for a long time. When it rythm with the breathing, it surely is not related to the heart but can be from the enveloppe f the heart [pericardium] when it is inflammed and the breathing rubs on the enveloppe. Pain can also come from pneumonia...

Related Questions

Could mucus cause chest pain and trouble breathing?

Yes. But so could a heart attack, pulmonary embolism, pneumothorax, and other dangerous conditions. You should get this looked at immediately.

What can cause chest pain during breathing?

Chest pain. Chest pain can be due to an heart attack, esophagitis, acid reflux, musculoskeletal problems, gall bladder disease, pericarditis, pneumonia, pleurisy etc. Check with your doctor.
Anything. Could be a problem with skin, nerves, muscle, shoulder, lung, heart, or stomach. See your doctor for a more thorough history, physical exam and further evaluation.

What causes chest pain and difficulty breathing after exercise?

Chest pain. Chest pain, as in angina... Can be chest, arm, neck, wrist... That is the heart can hurt and we feel it somewhere else. We call that an "anginal equivalent". Chest pain, healthy... Is your diaphragm (the big muscle under your lungs that drives your breathing) is "hurting" needing to clear the metabolites of muscle work.
Cp. Most probably exercise induced asthma or coronary artery disease or congestive heart failure or hypertrophic cardiomyopathy. Needs to be evaluated.

What would cause sev chest pain and difficulty breathing when lie on right side? When get up chest pain still continues but can breathe easier.

Chest pain. You should consult your doctor asap. There are several possibilities for your condition. You need an examination and tests.
May be Pericarditis. It could be pericarditis (an inflamation of the sac around the heart). Go see your doctor right away.