r/cancer↗
Cancer: Discussion & Support
R/Cancer is a place for people with cancer to support each other. Caregivers who are asking specific questions about side effects are also welcome. Please see R/CancerFamilySupport or R/CaregiverSupport if you are a caregiver who needs emotional support. Thank you.
95k subscribers942 posts / mo in Sep 2026 (incl. <1% by known bots)807 authors / mosince 2008
r/cancer has 95k members (+19% over the last 12 months). It gets about 942 posts a month from 807 people. Top topics: CancerFakesAndSurvivals, Cancer Immunotherapy Updates and CancerKarma.
When to post on r/cancer
You've used today's free reports
Visitors without an account can open 3 subreddit reports a day. The best time to post on r/cancer, removal risk and the rest of the report are one step away.
How r/cancer has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/cancer
Top topics
Share of the subreddit's posts
- CancerFakesAndSurvivals0.2%
- Cancer Immunotherapy Updates0.2%
- CancerKarma0.1%
- Cancer Awareness & Stories0.1%
- Cancer Loss Stories<0.1%
Brands people mention
Most-mentioned brands and sites, last 12 months
- Gofund
- Impact Guru
- TikTok
- ScienceDirect
- Ko-fi
Everything else about r/cancer
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research