No matter how old you are, your siblings can get under your skin like nobody else.

Some siblings may outgrow the constant bickering or disdain they felt toward each other in the childhood days and develop a close, loving relationship as adults. For others, though, the bond remains or becomes distant or fraught.

Having a less-than-peachy relationship with an adult brother or sister isnt uncommon. We asked therapists to reveal the sibling issues that their clients bring up the most in therapy. Heres what they said:

1. I dont like my siblings partner.

While you dont necessarily have to love the person your sibling is dating, at minimum, youd hope to find them at least tolerable. And if you really dislike their partner or worry that the relationship is toxic , it can bring up a lot of concerns and negative feelings. The tension may affect not only your bond with your sibling, but overall family dynamics as well, therapist Anna Poss said.

Clients who bring this issue to counseling have a grab bag of emotions: fear that this will ruin their relationship with their sibling, resentment of being expected to be around the new partner and anger if other family members do not feel the same way they do, Poss told HuffPost.

2. We dont talk anymore.

Sibling rivalries or other unresolved issues from childhood can seep into your relationship as adults, causing a divide.

Baggage from the past seems to hamper sibling relationships more than most others, said therapist Kurt Smith , who specializes in counseling men. While friends you can purge from your life, its much harder to do the same with siblings.

The rift may be ignored until family gatherings, holidays or aging parent issues bring them to the surface, Smith added.

3. Were stuck in our childhood roles.

Even as adults, siblings often continue to consciously or unconsciously enforce the roles that were assigned to each family member growing up for example: the baby, the boss or the black sheep, psychotherapist Kathleen Dahlen deVos said.

Continuing to be pigeonholed this way well into adulthood can be hurtful and get in the way of further personal growth.

In session, we might discuss the ways that these roles have shaped the clients personality, self and worldviews in ways that may or may not work for them, Dahlen deVos told HuffPost. Then, well tease out how they would like to identify as adults today from the outgrown aspects of the role they were assigned.