What should you know about sickle cell disease genetics?

A child receives one haemoglobin gene from each biological parent. Some people inherit changes that cause sickle cell disease, while others inherit one changed gene and one usual gene and have sickle cell trait. Trait is different from disease and is often identified through a blood test. If both parents carry a relevant change, a genetic counsellor can explain the possible combinations for a future child without predicting an individual outcome.

The altered haemoglobin can make red blood cells less flexible and may contribute to anaemia or episodes of blocked blood flow. Symptoms associated with sickle cell disease can include fatigue, joint pain, or pale skin, but symptoms alone cannot establish the genetic pattern.

Ask a clinician whether a blood test should identify haemoglobin types and whether genetic counselling is appropriate. Premarital screening may help couples understand carrier status before pregnancy. Bring results from relatives if available, and ask whether the result shows disease, trait, or another haemoglobin pattern. Do not change medicines or make reproductive decisions from a family story alone; the exact laboratory result matters.

Seek urgent medical help for severe pain, trouble breathing, marked weakness, confusion, or a high temperature, particularly when sickle cell disease is already diagnosed. A new symptom such as fatigue or joint pain still needs assessment for its cause; it does not by itself show that a person has sickle cell disease.

Ask: What does my haemoglobin result show? Do I have sickle cell trait or disease? Should my partner or close relatives be tested? Would genetic counselling help us understand pregnancy options?