What is this Constant ache in side like stitch?

There are a few potential causes for a constant ache in the side that feels like a stitch:

1. Intercostal muscle strain or tear: The intercostal muscles are located between the ribs and help with breathing. A strain or tear in one of these muscles can cause a sharp, stabbing pain in the side that worsens with deep breathing or coughing.

2. Pleuritis: Pleuritis is inflammation of the pleura, the thin membrane that lines the lungs and the inside of the chest cavity. It can cause a dull, aching pain in the side that may worsen with coughing or deep breathing. Pleuritis is often associated with other respiratory conditions, such as pneumonia, bronchitis, or tuberculosis.

3. Costochondritis: Costochondritis is inflammation of the cartilage that connects the ribs to the breastbone. It can cause pain in the chest or upper abdomen that may feel like a stitch or stabbing pain. Costochondritis is often associated with trauma to the chest or repetitive motion activities.

4. Peptic ulcer disease: Peptic ulcers are sores in the lining of the stomach or duodenum (the first part of the small intestine). They can cause a burning, gnawing pain in the upper abdomen that may worsen with eating or drinking. In some cases, the pain from a peptic ulcer can radiate to the side of the body.

5. Kidney stones: Kidney stones are hard mineral and salt deposits that form in the kidneys. When a kidney stone moves through the urinary tract, it can cause severe pain in the side, back, or abdomen. The pain may come and go in waves and may be accompanied by nausea, vomiting, or fever.

If you are experiencing a constant ache in the side that feels like a stitch, it is important to see a doctor for evaluation to determine the cause and receive appropriate treatment. The doctor may recommend further tests, such as imaging studies or blood tests, to help identify the underlying cause of the pain.