We do not know how safe sunscreens are because they have never been tested systematically. Oxybenzone in sunscreens has been shown to be absorbed into the bloodstream in humans, and to disrupt hormones in animals. Zinc oxide and titanium dioxide appear to be safe, except that manufacturers often convert them to nanoparticles that can be inhaled.
If you have been diagnosed as having sinusitis, and have sought help from allergists, ear-nose-and-throat-doctors, internists or surgeons, you know that you still have sinusitis, even though you may have had surgery, allergy shots, all kinds of medications and shots or any other treatment.
If you have developed shaking of your hands, you could have Parkinson's disease which is difficult to treat, or Benign Tremors which is usually easy to treat. You are more likely to have the more serious Parkinson's disease if you have the tremor at rest, a slow heart beat, rigid firm muscles, slowness to remember facts, difficulty speaking normally, depression or sleep disturbances.
People with arthritis should exercise to strengthen their muscles. This helps to stabilize their joints so they are not so loose that every movement chips off more cartilage. Exercises that put hard force on joints break cartilage, so the best exercise for people with arthritis is one that strengthens muscles without applying great force on joints. In T'ai Chi, a person moves very slowly for extended periods of time. Slow movements put great force on muscles to cause significant gain in strength without putting much force on joints.