Which activity only requires hand washing after the activity is completed ? diapering, giving medication, playing outdoors, preparing food beverages

Psoriatic arthritis

Explanation:

Psoriatic arthritis is a form of arthritis in which any part of body can be affected including fingertips and spine and it can range from mild to severe conditions. Red patches of skin are seen which are often topped with silvery scales. The main signs include joint pain, stiffness and swelling and sometimes the joint problems begin before skin patches appear.

The symptoms mentioned in the question are

So, these symptoms indicate towards the condition of Psoriatic arthritis.