Mental Effects
Mood & behaviour changes
Irritability, aggression, anxiety, and mood swings are documented hormonal effects, not just anecdotal. The people around you will notice before you do. Relationship damage, workplace issues, and social isolation are common.
Ask someone you trust to be honest about changes in your behaviour. If multiple people are telling you something has changed, listen.
Post-cycle depression
The testosterone crash after a cycle, combined with elevated oestrogen, frequently causes depression. This is biochemical, not weakness. It is one of the most dangerous periods. It drives many users back onto steroids and is associated with suicidal ideation.
Know that this is coming and plan for it. Tell someone you trust. Have your GP's number ready.
Body dysmorphia & dependency
Steroids can create or worsen body dysmorphic disorder. You may never feel big enough. Many users describe being unable to stop despite wanting to, because they cannot tolerate how they look without steroids.
If you can't take a break, or the thought of being smaller causes significant distress, speak to a mental health professional. The BDD Foundation and CALM provide support.