2-Day Back Ache: Causes and Relief Tips

According to the symptoms that you have mentioned, the most likely diagnosis to your muscle pain and fatigue is Myofascial Pain Syndrome. Which produces muscle pain and tenderness, similar to fibromyalgia, is among the symptoms of this condition. Muscles' trigger point gets developed, causing pain in different areas due to the compression against the nerves. The muscle would then become loosened up or weaker. The key features of this disorder include physical therapy sessions, injections of trigger point pressure, and a certain kind of drug guidance to manage stress.

The knee pain on the outer side might be from some trauma or strain. The hurting of the neck and the spinal cord can be from bad posturing and muscle tension. You need to let that affected region recover, apply ice to the area, and do light stretching with the injured or painful part. Always keep your posture in the right way and make more decisions to reach out to a physiotherapist as a part of your strategy to get better quicker.

Febuxostat is a medicine for gouty arthritis and loke drugs for hypertension, Diabetes and thyroid the medicine for gout also should not be stopped. Yes it's dose can be manipulated.

Knee crepitus can be from multiple causes. Painless crepitus can be ignored. So, I won't advice for crepitus knee treatment as such.. Crepitus from knee cap problems can be cured with hip and knee strengthening. Crepitus from cartilage irregularities or loose pieces often need minor keyhole surgery. Painful crepitus from arthritis is initially treated with physical therapy and surgery when therapy stops helping. 

Trauma can potentially trigger or exacerbate rheumatoid arthritis. By increasing inflammation or immune system response.