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Short explainers about growing up, feelings, boundaries, and relationships — written like a friend, not a textbook.
Puberty usually starts somewhere between about 8 and 13 for girls and about 9 and 14 for boys, and takes several years from start to finish. Height, body shape, body hair, skin, sweat, breast development, periods, erections and a deepening voice all arrive in their own order and at their own speed.
Starting earlier or later than your friends is normal. If something worries you, a doctor or school nurse can check it.
During puberty the body raises its levels of hormones like oestrogen and testosterone, and the brain keeps developing well into the twenties — the parts handling planning and impulse control mature last. Feelings can be stronger and change faster than they used to, and sleep patterns often shift later too.
Strong or swinging moods are a normal part of this stage. Feelings that stay heavy for weeks are worth telling an adult about.
Mental health is part of health. Stress, worry and low mood are common in adolescence and often pass. Regular sleep, eating, movement, daylight and time with people who matter to you all support how you feel. Guidance on screens is less settled — what you use them for, and whether they cost you sleep, matters more than a fixed number of hours.
If low mood, worry or sleep problems last more than a couple of weeks or get in the way of daily life, that's a reason to talk to a doctor, nurse or counsellor.
Consent means everyone involved actively and freely agrees, each time. It can't be assumed from silence, clothing, a past yes, or a relationship. It can be withdrawn at any point, and it isn't valid if someone is pressured, threatened, asleep or too intoxicated to agree. In Sweden the law is built on exactly this: sex without a clear expression of consent is a criminal offence.
No answer is not a yes. You can stop or change your mind at any time, and so can the other person.
Friendships, crushes, dating and family relationships all involve conflict sometimes — that alone isn't a warning sign. Healthy relationships share respect, honesty, trust and room to disagree. Warning signs are more about control: constant checking up on you, jealousy dressed as care, put-downs, pressure into sex or sending images, cutting you off from friends and family, or any threats or violence.
If someone is controlling, threatening or hurting you, that isn't your fault and it's worth telling an adult you trust.
Wanting to belong is a normal part of growing up, and friends influence each other in good ways as well as bad. Pressure is often indirect — jokes, group chats, what seems normal online — rather than someone directly telling you to do something. Deciding in advance what your answer is, and having one person you can call, both make it easier to say no.
You can say no, leave, or blame a parent for an exit. Real friends stay friends afterwards.
Nasi is a private AI tool for the questions you'd never ask out loud — it can help you sort out your thoughts and next steps. Nothing is saved, and no one will judge.