Hand, foot and mouth disease
Hand, foot, and mouth disease is a common childhood illness that can also affect adults. Common symptoms include sore throat, high temperature and loss of appetite, ulcers appear in the mouth and on the tongue.
These ulcers can be painful and make it difficult to eat or drink; raised spots usually appear on the hands and feet, and sometimes on the thighs and bottom as well., these spots can look pink, red, or darker than surrounding skin, depending on your skin tone, these spots can become blisters which appear grey or lighter than surrounding skin and can be painful.
The NHS guidance on hand, foot and mouth disease states antibiotics or medicines cannot be taken to cure hand, foot, and mouth disease; it usually gets better on its own in 7 to 10 days. More information can be found here.