However, common factors that can strain or end relationships for people include lack of trust, communication issues, and lack of mutual respect and understanding. Infidelity, financial problems, and lack of compatibility can also be causes of relationship problems. Other factors that can strain a relationship include jealousy, unrealistic expectations, lack of commitment, and an imbalance of power. It's important to note that every relationship is unique, and what may cause problems in one relationship may not have the same effect in another