If you feel like you or someone you know is in immediate danger, you should call 911 (or your country's local emergency line) or go to an emergency room to get immediate help. Explain that it is a psychiatric emergency and ask for someone who is trained for these kinds of situations.

Samaritans. To talk about anything that is upsetting you, you can contact Samaritans 24 hours a day, 365 days a year. You can call 116 123 (free from any phone), email jo@samaritans.org or visit some branches in person. You can also call the Samaritans Welsh Language Line on 0808 164 0123 (7pm–11pm every day).

SANEline. If you're experiencing a mental health problem or supporting someone else, you can call SANEline on 0300 304 7000 (4.30pm–10.30pm every day). SANE services provide practical help, emotional support and specialist information to individuals affected by mental health problems, their family, friends and carers. Textcare: http://www.sane.org.uk/what_we_do/support/textcare/

Call 07984 967 708 and leave a message, giving your first name and a contact number, and someone will call you back as soon as possible

National Suicide Prevention Helpline UK. Offers a supportive listening service to anyone with thoughts of suicide. You can call the National Suicide Prevention Helpline UK on 0800 689 5652 (open 24/7).

Campaign Against Living Miserably (CALM). You can call the CALM on 0800 58 58 58 (5pm–midnight every day) if you are struggling and need to talk. Or if you prefer not to speak on the phone, you could try the CALM webchat service 5pm to midnight, every day of the year

The Mix.If you're under 25, you can call The Mix on 0808 808 4994 (3pm–midnight every day), request support by email using this form on The Mix website or use their crisis text messenger service.

Papyrus HOPELINEUK. If you're under 35 and struggling with suicidal feelings, or concerned about a young person who might be struggling, you can call Papyrus HOPELINEUK on 0800 068 4141 (weekdays 10am-10pm, weekends 2pm-10pm and bank holidays 2pm–10pm), email pat@papyrus-uk.org or text 07786 209 697.

Nightline. If you're a student, you can look on the Nightline website to see if your university or college offers a night-time listening service. Nightline phone operators are all students too.

Switchboard. If you identify as LGBTQ++, you can call Switchboard on 0300 330 0630 (10am–10pm every day), email chris@switchboard.lgbt or use their webchat service. Phone operators all identify as LGBTQ++.

Refuge. Refuge provides 24hour support for people experiencing domestic violence. You can call 0808 2000 247 or send a message via the secure messaging service on their website and someone will get back to you at a time that is safe for you to speak. https://www.nationaldahelpline.org.uk/Contact-us

C.A.L.L. If you live in Wales, you can call the Community Advice and Listening Line (C.A.L.L.) on 0800 132 737 (open 24/7) or you can text 'help' followed by a question to 81066.

Rethink Mental Illness(formerly called the National Schizophrenia Fellowship). Works to help everyone affected by severe mental illness, such as schizophrenia and bipolar disorder, recover a better quality of life. It provides effective services and support and campaigns for change through greater awareness and understanding. National Advice Service: 0300 5000 927 (Open 9:30am to 4pm, Monday to Friday). Email advice@rethink.org

YoungMinds. If you're a parent of a young person experiencing mental health difficulties you can call the parents helpline: 0808 802 5544 (Mon-Fri from 9.30am to 4pm, excluding bank holidays). YoungMinds Crisis Messenger: text YM to 85258 (available 24/7)

NHS mental health services

Find information, advice and local services on the NHS website. You can also get advice from the NHS 111 phone service.

Other sources of mental health help and information

List of all UK mental health helplines from Helplines Partnership website

Mental Health Foundation provides useful information on a range of mental health difficulties, as well as resources to support your wellbeing

Mentally Healthy Schools has a wide range of information for schools and teachers to support young people’s mental health

Mental Health and Money Advice provides practical advice and support for people experiencing issues with mental health and money

Me and My Mind has some useful information for young people who may be having unusual experiences, such as paranoia or hearing voices

Mind's Infoline provides an information and signposting service. They're open 9am to 6pm, Monday to Friday (except for bank holidays). 0300 123 3393. Email: info@mind.org.uk

Befrienders Worldwide website has a tool to search by country for emotional support helplines around the world.

If you or anyone you know is experiencing abuse, domestic violence, suicidal thoughts or sexual assault, these are the numbers to call.

Algeria: Emergency: 34342 and 43

Suicide Hotline: 0021 3983 2000 58

Argentina: Emergency: 911

Suicide Hotline: (54-11) 4758-2554

Armenia: Emergency: 911 and 112

Suicide Hotline: (2) 538194

Australia: Emergency: 000

Suicide Hotline: 131114

Austria: Emergency:112

Telefonseelsorge 24/7 : 142

Rat auf Draht 24/7 : 147 (Youth)

Bahamas: Emergency: 911

Suicide Hotline: (2) 322-2763

Bangladesh: Emergency: 999

Barbados: Emergency:911

Suicide Hotline: Samaritan Barbados (246) 4299999

Belgium: Emergency: 112

Suicide Hotline: Stichting Zelfmoordlijn 1813

Bolivia: Emergency: 911

Suicide Hotline: 3911270

Bosnia & Herzegovina: Emergency: 124 or 611-111

Suicide Hotline: 080 05 03 05

Botswana: Emergency: 911

National Lifeline: 3911270

Brazil: Emergency:188

Suicide Hotline: 90035191

Bulgaria: Emergency: 112

Suicide Hotline: 0035 9249 17 223

Canada: Emergency: 911

Suicide Hotline: 1 (833) 456 4566

China: Emergency: 110

Suicide Hotline: 800-810-1117

Colombia: 24/7 Helpline in Baranquilla: 1(00 57 5) 372 27 27

24/7 Hotline Bogota: (57-1) 323 24 25

Croatia: Emergency: 112

Suicide Hotline: 014833888

Cyprus: Emergency: 112

Suicide Hotline: 8000 7773

Czech Republic: Emergency: 112

Crisis line: 284-016-666

Denmark: Emergency: 112

Suicide Hotline:4570201201

Egypt: Emergency: 122

Suicide Hotline: 7621602

Estonia: Emergency: 112

Suicide Hotline: 3726558088 ;

in Russian 3726555688

Finland: Emergency: 112

Suicide Hotline: 010 195 202

France: Emergency: 112

Suicide number: 0145394000

Germany: Emergency: 112

Suicide Hotline: 08001810771

Ghana: Emergency: 999

Suicide Hotline: 2332 444 71279

Greece: Emergency: 1018

Guyana: Emergency: 999

Suicide Hotline: 223-0001

Holland: Emergency: 112

Suicide Hotline: 09000767

Hong Kong: Emergency: 999

Suicide Hotline: 852 2382 0000

Hungary: Emergency: 112

Suicide Hotline: 116123

India: Emergency: 112

Suicide Hotline:8888817666

Iran: Emergency:110

Suicide Hotline: 1480

Indonesia: Emergency: 112

Suicide Hotline: 1-800-273-8255

Ireland: Emergency number: 116123

Suicide Hotline: +4408457909090

Israel: Emergency: 100 Suicide Hotline:1201

Italy: Emergency: 112 Suicide Hotline: 800860022

Jamaica: Emergency: 119

Suicide Hotline: 1-888-429-KARE (5273)

Japan: Emergency: 110

Suicide Hotline: 810352869090

Jordan: Emergency: 911

Suicide Hotline: 110

Latvia: Emergency: 113

Suicide Hotline: 371 67222922

Lebanon: Suicide Hotline: 1564

Liberia: Suicide Hotline: 6534308

Luxembourg: Emergency: 112

Suicide Hotline: 352 45 45 45

Malaysia: Emergency: 999

Suicide Hotline: (06) 2842500

Malta: Suicide Hotline: 179

Mauritius: Emergency: 112

Suicide Hotline: +230 800 93 93

Mexico: Emergency: 911

Suicide Hotline: 5255102550

Netherlands: Emergency: 112

Suicide Hotline: 900 0113

New Zealand : Emergency: 111

Suicide Hotline: 1737

Nigeria: Suicide Hotline: 234 8092106493

Norway: Emergency: 112

Suicide Hotline: +4781533300

Pakistan: Emergency: 115

Suicide Hotline: 0337-9216207

Philippines: Emergency: 911

Suicide Hotline: 028969191

Poland: Emergency: 112

Suicide Hotline: 5270000

Portugal: Emergency: 112

Suicide Hotlines: 21 854 07 40 and 8 96 898 21 50

Romania: Emergency: 112

Suicide Hotline: 0800 801200

Russia: Emergency: 112

Suicide Hotline: 0078202577577

Saint Vincent and the Grenadines: Emergency: 911 or 999

Suicide Hotline: 9784) 456 1044

Saudi Arabia: Emergency: 112

Serbia: Suicide Hotline: (+381) 21-6623-393

Singapore: Emergency number: 999

Suicide Hotline: 1 800 2214444

Spain: Emergency: 112

Suicide Hotline: 914590050

South Africa: Emergency: 10111

Suicide Hotline: 0514445691

South Korea: Emergency: 112

Suicide Hotline: (02) 7158600

Sri Lanka: Emergency number: 1919

Suicide Hotline: 011 057 2222662

Sudan: Suicide Hotline: (249) 11-555-253

Sweden: Emergency number: 112

Suicide Hotline: 46317112400

Switzerland: Emergency: 112

Suicide Hotline: 143

Thailand: Emergency: 191

Suicide Hotline: (02) 713-6793

Tonga: Emergency: 922

Suicide Hotline: 23000

Trinidad and Tobago: Emergency: 911

Suicide Hotline: (868) 645 2800

Turkey: Emergency: 112

Suicide Hotline: 182

United Arab Emirates: Emergency: 999

Suicide Hotline: 800 46342

United Kingdom: Emergency: 112

Suicide Hotline: 0800 689 5652

United States: Emergency: 911

Suicide Hotline: (800) 273-8255

For other global helplines and resources see also Together We are Strong and Checkpoint's website

You don't need to be experiencing a crisis to contact a crisis hotline. At most of these hotlines, the volunteers and counselors who answer calls, texts and chat messages are trained to help someone in crisis. But you can also reach out if you're feeling sad, anxious or stressed and don't know where to turn.

These hotlines also serve friends, family members and loved ones of someone who is experiencing a mental health crisis, domestic violence, abuse, addiction and many other issues.

Even if someone at a crisis hotline cannot help you with your specific needs, they can point you to the right resources that can. No one will ever make you feel bad for trying to get help, and no concern is too trivial or small. If it feels hard for you to manage, it's worth reaching out.