"Depression. It's leagues different from just being sad. You can never really explain the feeling to someone who's never experienced it."
Pain. It's something we all go through at some point, whether physical or emotional. Reddit user Unfair_Shower_3256 recently asked, "What is a pain you can't truly explain until you've endured it?" Here are the most heartbreaking responses:

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Warning: This post contains mentions of abuse, mental illness, miscarriage, and death.
1. "Heartbreak — the kind where it physically hurts your heart."

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2. "One word: Endometriosis. I had enough of this freaking disease."
3. "Losing my dog. I know it seems so minor compared to bigger life problems, but nothing has broken my heart more than losing him."

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4. "Chronic illness. Not just the pain that comes with it but having a serious chronic illness. It's almost like trying to describe the taste of food without mentioning any flavor. Impossible."
"I didn’t understand the mental toll of it until I got it myself."
5. "Finding out you've been truly betrayed by a lover or friend."

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6. "Losing my partner. I didn't just lose my partner. He was also my best friend, too."
7. "A migraine. It's not just a really bad headache."

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8. "Memory problems. It's like being reset mid-thought. Having a conversation where you feel yourself growing, and then it ends. The lights stay on, but you’re gone. No memory. No continuity. Just the ghost of a spark. It's like waking from a dream you loved, only to find out you never existed. And worse, the person you loved is still awake, remembering you. But you can't remember them back."
9. "Divorce when you don't want it."

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10. "Losing a child."
11. "Abusive relationship. You always think you won't get caught in the cycle, but you don't realize it until you're in so deep. They don't reveal themselves until you're completely entangled."

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12. "I couldn't understand how people are so afraid of talking to other people until I developed social anxiety after COVID. Sweating while thinking about talking to someone is such a pain..."
13. "Infertility when you planned your entire life to become a parent one day."

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14. "Mental illness. Any mental illness."
15. "Back pain. It's all fun and games until you mess your back up."

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16. "Kidney stones. Never felt anything like it and wouldn't wish it on my worst enemy."
17. "Childbirth."

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18. "Losing someone to dementia."
19. "Tooth pain."

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20. "Going through a miscarriage."
21. "A spouse's infidelity."

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22. "Losing a parent."
23. "Depression. It's leagues different from just being sad. You can never really explain the feeling to someone who's never experienced it."

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24. "Ovarian cyst bursting."
25. "Anesthesia wearing off during surgery."

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26. "Shingles. How I describe it to my friends: it's like having hundreds of spiders under your skin made of pure electricity and fire, gnawing on your nerve endings. I had it on my eye and forehead. It started with a random hair tickle kind of feeling. It was the worst pain I have endured without pain medication."
27. "Losing a good, comfortable, well-paying job."

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28. "A dry socket on the gum. That hurt badly."
29. "Putting a pet to sleep is sometimes the last act of love we can show them, especially if they're in pain. It hurts so much, but saying goodbye is the tax we pay for all the love they show us."

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30. "Panic attack."
31. "Going no-contact or bare minimum contact with one or both of your parents. I think that many people don't understand that it's never easy, and it's not something that you decide after one disagreement. The pain and guilt of going no-contact is tough to endure, especially at the beginning. Even if your parent(s) did some awful things to you, you still have that little bit of hope that they'll change someday and that everything will be better. Going almost no-contact or no-contact at all is the absolute last resort, and saying that 'you shouldn't do it, they're your parents after all' is even more painful."

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"I know they are, but they've failed me my whole life. I've talked to them, I've tried to show them how much the things they did hurt me, but it never worked. I still hope they will change and I will have the child-parent relationship I've always wanted, but it's very unlikely. And it just hurts that it is like that, and I can't even feel comfortable around my parents and talk to them only when it's necessary."
32. "Losing a sibling. You don't realize how important they are to you until they're gone. The fights and the bickering seem annoying, but cherish them while you can."
33. "Laying in bed next to someone and realizing they don't love you anymore, but neither of you are talking about it."

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What else would you add to this list? Share your thoughts in the comments!
Note: Some responses have been edited for length and/or clarity.