The immune system protects the body against several harmful pathogens, bacteria, and viruses. It provides protection against severe infections and diseases. If a person is having a weak immune system, he/she is more prone to illnesses and other complications. The immune system can get weakened by smoking, drinking alcohol, stress, obesity, aging, medical conditions such as HIV, cancer, and other medications like steroids, chemotherapy drugs.

Digestive problems – Many times the root cause of most diseases is a weak digestive system. Diarrhea, bloating, constipation are some signs and symptoms of a weak digestive system. 

Delayed growth and development – Weak immune system corresponds to delayed growth and development in children. 

Frequent cold and infection – A person with weak immune system tends to have frequent episodes of cold and infection and may take longer to recover. Having 2-3 episodes of cold infection a year is common but getting more than this and at frequent intervals indicates a weak immune system.

Delayed wound healing - If the immune system is weak, wounds take longer to heal following inflammation, trauma, and surgery. This also increases the risk of infection.

Skin infection – Skin is the first barrier of the skin. A weak immune system can result in frequent skin infections, rashes, inflammation, or dry skin. 

Autoimmune diseases - In autoimmune diseases, the body’s immune system mistakenly attacks its own cells. When the immune system is weak, there is overactivity or abnormally low activity of the immune system. If the immune system is overactive, it increases the risk of autoimmune diseases.

Blood disorder – Conditions of blood disorders like anemia, hemophilia, blood clot, and blood cancer indicate a weak immune system.

Organ inflammation - Organ inflammation can weaken the body’s immune system. Organ inflammation could happen due to injury, toxins, pathogens, trauma, heat, etc. Any injury to the body tissues that result in inflammation is a sign of a weakened immune system.