Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services for sudden shortness of breath, chest pain, coughing up blood, fainting, or severe difficulty breathing.
These symptoms can occur when a clot travels to the lungs.
Emergency help is also appropriate if someone is at immediate risk of self-harm.
Report a new breast lump, nipple discharge, or one-sided breast change promptly.
Seek urgent medical care for sudden swelling, pain, warmth, or redness in one leg, particularly if it is unexplained.
These can be signs of a blood clot.
Arrange a routine appointment if a child has persistent speech, movement, learning, or puberty concerns.
Teenagers and adults should also seek advice for very small testes, breast tissue growth, low sexual interest, erection difficulties, ongoing fatigue, or fertility concerns.
If you already have a diagnosis, routine follow-up may include checks of testosterone, bone health, weight, blood pressure, blood sugar, and cholesterol.
Every sign above is quoted from the sofidex article on Klinefelter syndrome. If you are not sure, err upward — it is always reasonable to be checked.