red tongue

fever, poor appetite, sore throat, white patches in mouth or throat

Strep throat (or "Streptococcal pharyngitis", or "Streptococcal Sore Throat") is a form of Group A streptococcal infection that affects the pharynx. ... 

blister(s) or bump(s) on skin, impaired sensations in foot (feet), lump or swelling in groin in males, stomach pain

pain in mouth, pain in tongue

Glossitis is inflammation or infection of the tongue. It causes the tongue to swell and change color. Finger-like projections on the surface of the tongue (papillae) may be lost, causing the tongue to appear smooth. ... 

fever, palpitations, passing out, redness in skin

Toxic shock syndrome (TSS) is a rare but potentially fatal disease caused by a bacterial toxin. Different bacterial toxins may cause toxic shock syndrome, depending on the situation. The causative agent is Staphylococcus aureus. A similar condition, called Toxic Shock Like Syndrome (TSLS), is the result of Streptococcus pyogenes infection. TSLS is also referred to as Streptococcal TSS. ... 

fever, poor appetite, rash, redness in skin

Scarlet fever is an exotoxin-mediated disease caused by Group A streptococcal infection that occurs most often in association with a sore throat and rarely with impetigo or other streptococcal infections. It is characterized by sore throats, fever and a rash over the upper body that may spread to cover almost the entire body. Scarlet fever is not rheumatic fever, but may progress into that condition as the infection develops (rheumatic fever is the autoimmune disease that occurs after infection with Group A strep). ... 

blister(s) or bump(s) on skin, fever, pain in several joints, red eye(s)

Stevens-Johnson syndrome (SJS) is a severe and life-threatening condition. It is thought to be a hypersensitivity complex affecting the skin and the mucous membranes. ... 

blister(s) or bump(s) on skin, fever, poor appetite, rash

nausea, swollen feet, swollen feet and legs, weight loss

Coeliac disease or celiac disease is an autoimmune disorder of the small bowel that occurs in genetically predisposed individuals in all age groups after early infancy. Symptoms may include diarrhoea, failure to thrive (in children) and fatigue, but these may be absent and associated symptoms in all other organ systems have been described. It affects approximately 1% of Caucasian populations, though it is significantly underdiagnosed. A growing portion of diagnoses are being made in asymptomatic persons as a result of increasing screening. ... 

dizziness, heavy menstrual periods, paleness, weakness

Iron deficiency anemia is the most common type of anemia, and the most common cause of microcytic anaemia. ... 

dizziness, impaired sensations in foot (feet), paleness, weakness

Folic acid and folate (the anion form) are forms of the water-soluble Vitamin B9. These occur naturally in food and can also be taken as supplements. Folate gets its name from the Latin word folium ("leaf"). ...