Dr. Hanif warmly Welcomes you! Thanks for consulting at my virtual clinic. I have carefully worked through your case, and I can realize your health worries. Being your physician, I assure you not to worry as I will take care all of your medical concerns. Fatigue of unknown cause is one of the early signs of:- Diabetes Hypertension Thyroid problems Abnormal lipid profile Muscular, skeletal disorders Viral Hepatitis Final Suggestion:- Kindly consult your physician for complete evaluation and diagnostic testing to reach to a proper diagnosis being the reason for this weakness. Once He reaches a diagnosis, treatment goes accordingly. He is the personnel to treat such diseases successfully. Hope I answered all of your health concerns . If you have further questions in future, feel free to contact me anytime. In the start of your question write my name, and I will get back to you in no time. If satisfied, please click you found it helpful. Have a wonderful time ahead. Best Regards! DR. MUHAMMAD M. HANIF USA