Conclusion
Some diseases are more common than others while some are harder to detect than others. The 10 conditions we highlighted in this article are some of the hardest diseases to detect in the body with some laying as much as 2 years before they are diagnosed. Through examination is required before the diseases can be detected and it is always wise to seek a second opinion where you are unsure.
References:
[1] https://www.mayoclinic.org/diseases-conditions/sleep-apnea/symptoms-causes/syc-20377631
[2] https://www.medicinenet.com/joint_pain/symptoms.htm
[3] https://www.psychiatry.org/patients-families/depression/what-is-depression
[4] https://www.medicalnewstoday.com/articles/7621
[5] https://www.healthline.com/health/common-thyroid-disorders
[6] https://www.mayoclinic.org/diseases-conditions/chronic-fatigue-syndrome/symptoms-causes/syc-20360490