Iron deficiency causes anemia (low hemoglobin and reduced numbers of red blood cells), which results in tiredness and shortness of breath because of poor oxygen delivery.
The most common minor side effects are nausea, vomiting, abdominal cramping or bloating, breast pain, tenderness or swelling, swollen ankles or feet, tiredness, and acne.
The result of stress can be lack of concentration or motivation, over tiredness due to sleeping problems, health issues through poor diet, eating disorders and many more.
When present, the symptoms are non-specific and usually include fever, tiredness, loss of appetite, nausea, abdominal discomfort, dark urine, clay-colored bowel movements, and jaundice (yellowing of the skin and eyes).
In addition to a runny nose and fever, signs of a cold include coughing, sneezing, nasal congestion, headache, muscle ache, chills, sore throat, hoarseness, watery eyes, tiredness, and lack of appetite.